JP2003344909A - Flash light emitting device and optical equipment equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flash light emitting device which has small operation range volume of a component and can efficiently vary the angle of irradiation with the illumination light from a light source. <P>SOLUTION: The flash light emitting device has a light emitting tube, a 1st prism member which is arranged in front of the light emitting tube, a 2nd prism member which is arranged on a light emitting surface of the 1st prism member and is movable on the light emitting surface of the 1st prism member along the length of the light emitting tube, a coupling means which is coupled to the 2nd prism, and a driving means which drives the coupling means, and the angle of light distribution is varied by varying the quantity of an overlap between the 1st and 2nd prism members viewed from the light emission side by the driving means. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash light emitting device and an optical apparatus including the flash light emitting device. For example, the flash light emitting device is attached to a part of a camera body (photographing device), and the illumination light (flashlight) is interlocked with the photographing operation of the camera body. ) A video camera that changes the irradiation angle according to the purpose and efficiently irradiates the subject side for shooting.
It is preferably used for film cameras, digital cameras and the like.

[0002]

2. Description of the Related Art In a flash light emitting device used in an optical device such as a camera, in order to efficiently collect light beams emitted from a light source in various directions within a required irradiation angle of view,
Various proposals have been made conventionally. In particular, in recent years, there has been proposed an optical member such as a prism or a light guide that uses total reflection in front of a light source to improve the light-collecting efficiency and reduce the size.

On the other hand, the photographing system used for optical equipment tends to have a high magnification zoom. When a flash light emitting device with a fixed irradiation range is used for such an optical device, the maximum irradiation range is illuminated even in a tele state where the required irradiation range is narrow, resulting in a large energy loss. In order to eliminate this phenomenon, there has been conventionally proposed a flash light emitting device with a variable irradiation angle for performing illumination corresponding to a shooting range.

For example, in Japanese Unexamined Patent Publication No. 4-138439, a condensing optical system in which total reflection is performed by an optical prism is described.
By changing the positional relationship between the optical prism and the light source relatively, the total reflection surface and the refraction are switched to change the irradiation range. Further, in Japanese Patent Laid-Open No. 8-262538, the optical prism is divided into a plurality of parts, and the optical prisms arranged above and below are rotated to switch the irradiation range.

Further, in order to change the irradiation angle in the longitudinal direction of the light source, the optical path is switched by inserting or rotating a diffusing member or a reflecting member in synchronization with the front-back movement of the front panel in the direction along the emission optical axis, Then, there is one in which the optical path can be changed by a prism formed integrally with the front panel.

[0006]

By disposing an optical member such as a prism and a light guide in front of the light emitting means,
In order to improve the light collection efficiency and to change the irradiation angle, a flash light emitting device is required to be small in size in response to the demand for downsizing the entire camera (optical device).

In a conventional drive mechanism of a flashlight emitting device with a variable irradiation angle, a method of moving parts such as a xenon tube and a reflector in the optical axis direction requires a large operating range volume of the parts.
The entire device tended to be large.

Further, a method of moving, inserting, or rotating a diffusing member or a reflecting member along the direction of the emission optical axis for the purpose of condensing and diffusing light in the longitudinal direction (horizontal direction) of the light source is the operating range of parts. The volume tends to be large, and the entire device tends to be large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flash light emitting device capable of efficiently changing the irradiation angle of illumination light from a light source, and an optical apparatus including the flash light emitting device, because the volume of the working range of the parts can be small.

[0010]

According to a first aspect of the present invention, there is provided a flashlight emitting device, and a flash tube and a first flash lamp disposed in front of the flash tube.
A prism member and a second prism member which is disposed on the light exit surface of the first prism member and is movable on the light exit surface of the first prism member and in the longitudinal direction of the arc tube. A connecting means connected to the second prism and a driving means for driving the connecting means, and when viewed from the light emitting side of the first and second prism members by the driving means. The feature is that the light distribution angle is changed by changing the overlapping amount.

According to a second aspect of the present invention, in the first aspect of the present invention, the connecting means is a connecting member connected to the second prism, and the connecting member is connected to the connecting member, and the rotational driving force from the driving means is linearly driven. And a drive direction changing member for converting into force.

According to a third aspect of the present invention, in the first aspect of the present invention, the connecting means is a connecting member connected to the second prism, and a cam member connected to the connecting member and driven by the driving means. It is characterized by having.

The optical device according to the invention of claim 4 is the optical device of claim 1,
It is characterized by having two or three flash light emitting devices.

[0014]

1 to 11 are explanatory views of a first embodiment of the present invention. 19 to 26 are explanatory views of the optical system of the flash light emitting device according to the present invention. First, FIGS.
The optical system of the flash light emitting device according to the present invention will be described with reference to FIG.

The optical system of FIGS. 19 to 26 shows the configuration of the optical system of the flash light emitting device in which the operating range of the components is made small and the light distribution angle (irradiation angle) of the illumination light is made variable. Figure 2
1 and FIG. 22 are a front view of a main part (a view from the subject side) and a plan view of the main part when the distribution angle of the illumination light is narrow.

FIG. 19 is a sectional view taken along the line A in FIGS. 21 and 22 in a state where the light distribution angle of the optical configuration is narrow.

In FIG. 19, a xenon tube (light source) 10 is provided.
Of the light emitted from the light source 1, light traveling toward the left side of the paper in the direction opposite to the subject side on the right side of the paper is a semi-cylindrical reflector 102.
Then, the light is reflected by the light source 101 and is returned to the light source 101 again, and is emitted to the subject side on the right side of the drawing. Of the light emitted from the xenon tube 101 to the subject side, the light emitted above the paper surface is
After being refracted by the incident surface 103C of the prism 103, it is totally reflected by the total reflection surface 103TR, and the prism 1 is converted into parallel light.
The light is emitted to the subject side from the emission plane portion 103H1 of No. 03. Here, the light beam emitted from the xenon tube 101 to the upper right of the paper surface is bent upward by being refracted by the incident surface 103C, so that the total reflection surface 103 of the prism 103 is formed.
The size of TR can be reduced. Further, of the light emitted from the xenon tube 101 to the subject side, the light emitted below the paper surface is configured so that the reflection plate 102 and the prism 103 are vertically symmetrical with respect to the optical axis AXL of the prism 103. It has the same effect as the above-mentioned light emitted upward. Further, among the light emitted from the light source 101 toward the subject side, the light near the optical axis AXL is the prism 10
The light is refracted by the cylindrical lens portion 103R of No. 3 to become parallel light, and emitted from the emission plane portion 103H to the subject side. The reflection plate 102 is the total reflection surface 1 of the prism 103.
It is configured to cover the total reflection surface 103TR up to near the optical axis that does not satisfy the total reflection condition of 03TR.

The shape of the total reflection surface 103TR is preferably a parabola or a cylindrical aspherical surface close to a parabola in order to maintain good parallelism of the emitted light. Further, the cylindrical lens portion 103R of the prism 103 is
It is preferably formed by a hyperboloid.

More specifically, when the value of the conical coefficient K shown below is a negative value of the square of the refractive index of the material of the prism 103, the spherical aberration of the lens portion 103R of the prism 103 can be made zero. . For example, prism 1
When the material refractive index of 03 is 1.5, the conic coefficient is -2.
25 is preferred. Aspherical expression

[0020]

[Equation 1]

Here, X: sag amount R; paraxial radius of curvature K; conical coefficient h; distance from optical axis In this way, all the light emitted from the center of the xenon tube 101 is converted into parallel light.

FIG. 20 is a sectional view taken along the line B in FIGS. 21 and 22 in a state where the light distribution angle of the optical configuration is narrow.

In FIG. 20, a plurality of cylindrical lens portions 103P having a convergent property are formed on the exit side of the B section of the prism 103. A lens plate 104 having a plurality of divergent cylindrical lens portions 104N for canceling is arranged.
Therefore, all the light emitted from the xenon tube 101 is converted into parallel light as in FIG.

As shown in the front view of the optical configuration of FIG. 21 (viewed from the subject side) and the bottom view of the optical configuration of FIG. 22, a lens plate 104 having a plurality of cylindrical lens portions 104N, and exactly the same lens plate 104. Shaped lens plate 10
Reference numeral 5 is movable in the left-right direction on the paper surface. 21 and 22, the light distribution angle of the light flux emitted from the flash light emitting device is narrow, and the cylindrical lens portion 103P having a convergent property and the cylindrical lens portion 104N having a divergent property completely overlap each other. The refracting powers cancel each other out, and the light emitted from the xenon tube 101 is emitted without being diffused. Further, the light emitted from the plane emission portion 103H1 of the prism 103 is emitted as parallel light without being diffused as shown in FIG.
In the state described in 2, the light emitted from the center of the xenon tube 101 is emitted on all emission surfaces of the flash light emitting device without spreading in the vertical direction of the paper surface.

FIG. 25 and FIG. 26 are a front view and a plan view of the main part when the light distribution angle of the illumination light is wide. FIG. 23 is a cross-sectional view of the C cross section in FIGS. 25 and 26 in a state where the light distribution angle is wide.

The parallel light emitted from the emission plane portion 103H1 of the prism 103 is diffused in the vertical direction of the paper by the lens plate 4 having a plurality of divergent cylindrical lens portions 104N.

FIG. 24 is a sectional view of a section D in FIGS. 25 and 26 in a state where the illumination light has a wide distribution angle.

By the exiting cylindrical lens surface 103P of the prism 103, the parallel light emitted from the xenon tube 101 is diffused in the vertical direction on the paper surface.

25 and 26 show a state in which the illumination light has a wide light distribution angle, and the lens plate 10 has a plurality of divergent cylindrical lens portions 104N.
4 is a state in which the prism 103 has moved to the left side of the paper surface of the prism 103, and the same lens plate 105 as the lens plate 104 has also moved to the right edge of the paper surface of the prism 103. In this way, the cylindrical lens portion 103P having a convergent property of the prism 103 and the lens plates 104 and 105 having the plurality of cylindrical lens portions 104N and 105N having a divergent property are arranged so as not to overlap at all. Therefore, as shown in FIGS. 23 and 24, the light emitted from the xenon tube 101 on the entire emission surface 103H of the flashlight emitting device is diffused in the vertical direction of the paper surface in FIGS.

In this way, the light distribution angle in the vertical direction is changed by making the diffusion area on the exit surface variable. When the lens plates 104 and 105 are located at an intermediate position between FIG. 23 and FIG. 27, the area of vertical diffusion on the exit surface of the prism 103 and the lens plates 104 and 105 is half that in FIG. The light distribution angle in the vertical direction has an intermediate value between the states shown in FIGS. By continuously varying the overlapping area of the converging cylindrical lens portion 103P of the prism 103 and the lens plates 104 and 105 having a plurality of diverging cylindrical lens portions 104N and 105N, a photographing lens (not shown) can be provided. It is possible to obtain the optimum irradiation angle corresponding to the change of the focal length in the case of the zoom lens. Further, the volume of the operating range of the moving parts for changing the irradiation angle can be small, and the device can be downsized.

Next, referring to FIGS. 1 to 11, in the flash light emitting device with variable irradiation angle according to the present embodiment, the lens plate 10 is used.
A specific configuration of a driving mechanism for driving the Nos. 4 and 105 will be described.

1 to 11, reference numeral 1 denotes an upper cover as an exterior of the camera body, which constitutes a part of the camera body. Reference numeral 2 denotes a case, which is rotatably supported by the upper cover 1 and forms a skeleton of a strobe unit. Reference numeral 2a is an elongated hole, and has a role of passing a lead wire 40 described later. Reference numeral 3 is a strobe cover that forms the appearance of a strobe unit and is fixed to the case 2. Reference numeral 4 denotes a panel which covers the entire surface of the strobe unit and protects the strobe optical section and the red-eye preventing lamp optical sections 33 and 34 described later. Reference numeral 5 denotes a base plate, which has a plurality of gear shafts, a bearing 5a having an outer periphery as a rotating shaft of the case 2, a bearing 5b, and a spring hook 5c, and is fixed to the back side of the upper cover 1 with screws. Reference numeral 6 is a gear, which is a camera body or a mirror BO
A motor M2 fixed to X and a gear train connected to the motor M2 and including a planetary gear mechanism to be described later are meshed and only rotation in one direction is transmitted. Reference numerals 7 and 8 denote gears, and the rotation of the gear 6 is transmitted from the gear 7 to the gear 8.

Reference numeral 9 is a gear meshing with the gear 8 and includes a main plate 5
Is rotationally fitted to the inner circumference of the bearing 5a. Reference numeral 10 is a gear that meshes with the gear 9, and has three equal-angled blade portions 10a on one surface as shown in FIGS. 11 is a lever,
The shaft portion 11a, the protrusion 11b, the spring hook 11c, and the switch pressing portion 11d are provided, and the shaft portion 11a is rotatably supported on the inner circumference of the bearing 5b. The switch pushing portion 11d is provided with the switch SW3 when the lever 11 is moved during pop-up.
(See FIGS. 2 and 7) is turned on. Reference numeral 12 is a tightening lever having a claw portion 12b, and a protrusion 12 is provided near the claw portion 12b.
It has a and is fixed to the shaft 11a of the lever 11. Reference numeral 13 is a spring, one end of which is hooked on the spring hook 5c of the main plate 5 and the other end of which is hooked on the spring hook 11c of the lever 11 so that the tension lever 12
Is urged so as to rotate counterclockwise, that is, the claw portion 12b in the locking direction. Reference numeral 14 denotes a bearing, a part of which is fixed to the upper cover 1 and a part of which serves as a rotating shaft of the case 2.

Cases 2 and 15R have an upper cover 1
It is a screw that serves as a stopper when it rotates in the protruding direction, and is fastened to the upper cover. Reference numeral 16 denotes a spring that biases the case 2 in a protruding pop-up direction. The spring 16 is attached to a part of the outer periphery of the bearing 14, and one arm can be screwed on the screw 15R and the other arm can be hooked on the case 2. Reference numeral 17 is a fixed locking member having a hook 17a for hooking the claw portion 12b of the tension lever 12.
As shown in detail in FIG. 6, it has cam portions 17b and 17c, and the cam portion 17c is an arc from the rotation axis of the case 2 and is fixed to the case 2.

When the motor M2 is driven as shown in FIGS. 5A to 5C, the rotation is transmitted to the gears 6 to 10, and the blade portion 10a of the gear 10 resists the spring 13. The protrusion 11b of the lever 11 is pushed down. Then, the tension lever 12 is rotated clockwise like the lever 11, and the claw portion 12b of the tension lever 12 is hooked to the hook 17 of the fixed locking member 17.
When the case 2 is released from a, the case 2 starts to rotate in the projecting direction by the bias of the spring 16, and the projection 12a abuts on the cam portion 17b of the fixed locking member 17.

Further, the case 2 is rotated, and the case 2 is rotated by the force of the spring 16, whereby the fixed locking member 17
From the cam portion 17b to the cam portion 17c of the tension lever 1
2 push the protrusion 12a and press the lever 1 in the area of the cam portion 17c.
The tension lever 12 rotates until the protrusion 11b of No. 1 moves away from the rotation region of the blade portion 10a of the gear 10 (FIGS. 5B to 5C). That is, the tension lever 12 is released by the blade 10a, the case 2 is moved up, the tension lever 12 is further released by the movement of the case 2 up, and the protrusion 11b of the lever 11 is rotated outside the rotation region of the blade 10a. Further rotation of the motor M2 requires lever 1
1 and the tension lever 12 are not transmitted.
In addition, the protrusion 12a is driven by the spring 13 to press the cam portion 17c.
The strobe case 2 rotates in the protruding direction until it comes into contact with the screws 15L and 15R, while generating a constant frictional force in the circular arc portion (Figs. 5 (A) to 5 (C)).

Reference numeral 18 denotes a gear, which is a gear 9 in the upper cover 1.
It is fixed coaxially with and is transmitted to the rotating case 2. 1
Reference numerals 9 and 20 are idlers for transmitting the rotation of the gear 18.
21 has a cam 21a on one surface and a contact piece 31 (see FIG. 2) on the other surface.
(See FIG. 9) is a fixed gear, and as shown in FIG. 9, has four phases including a wide-angle part, a telephoto part, and two standard parts. Reference numeral 32 denotes a substrate (see FIGS. 2 and 10) on which the contact piece 31 slides, and as shown in FIG. 10, the brake phases are constant at 90 ° intervals of standard → telephoto → standard → wide-angle → standard →. It is provided for each angle and detects the rotational phase of a lever 22 having a roller 22a described later that detects the phase of the cam 21a. As mentioned above, the gears 19 to 21 are the case 2
It is rotatably supported by the shaft of. Reference numeral 22 denotes a transmission lever having a bearing rotatably mounted on the shaft of the case 2, a roller 22a for tracing the cam 21a, and a pushing portion 22b for pushing one end of the arm 108. 24 is a holding plate, which is a gear 19-
21 is screwed to the case 2 with the transmission lever 22 and the transmission lever 22 held down.

FIG. 11 shows the start of the brake in the standard time (A) and the stop after the overrun (B).

The gear 21 having a cam and the gear 10 having a blade have a specific gear ratio set via the gear 9 and the gears 18 to 20. That is, in this embodiment,
The gear 10 is set to rotate 2/3 each time the gear 21 rotates 1/4. In short, the gear 21 is the substrate 3
The brake phase appears every 90 ° (1/4 rotation) by the pattern 2 and the blades of the gear 10 at that time are in the state of (A), and then overrun and the maximum allowable position is (B). It is in a state.

The gear ratio is set so that the overrun falls from the state of FIG. 11 (A) to the state of FIG. 11 (B) in all cases such as the motor M2, the power supply state, and the temperature condition. That is, when the brake pattern of the substrate 32 is 15 °, the gear 10 overruns by about 40 ° and stops, and the blades of the gear 10 stop within the same phase in any of the standard, telephoto, and wide-angle modes. ing.

From the above, the projection 11b of the lever 11 does not interfere with the blade portion 10a of the gear 10 when the pop-up strobe is pushed down in any of the standard, telephoto, and wide-angle states. Is caught on the hook 17a of the fixed locking member 17, and the strobe is fixed in the housed state.

Further, in the present embodiment, the cam of the gear 21 is divided into four phases, and the number of blades of the gear 10 is three, so that the rotation of the gear 10 is 8/3 times the rotation of the gear 21. Although the ratio is set, it may be 4/3 times, or the gear 21
The gear ratio with the gear 10 is set to 1/3 with the three cams
It may be a multiple of. That is, the cam phase of the gear 21 and the phase of the blade of the gear 10 are matched, and the number of stop positions of the gear 21 and the gear before the phase similar to that of the blade portion 10a of the gear 10 arrives at any stop position of the gear 21. The number of blades 10a of 10 and the gear ratio may be matched.

Reference numeral 101 is a xenon tube, and a reflecting shade 102
It is fixed with rubber (not shown). 103 is a prism (first
Prism). Reflector shade 10 for prism 103
2 are brought into close contact with each other, and the prism 103 is further adhered and fixed to a predetermined position of the case 2. Reference numerals 104 and 105 denote lens plates (second prisms). Each shaft 104a on the top
And 105a, and projections 104b and 105b at the bottom. The shafts 104a and 105a are rotatably fitted to arms (coupling members) 106 and 107, which constitute one element of the coupling means, and the portions protruding from the arms 106 and 107 are formed inside the cover 3. Slide to 3b. Further, the protrusions 104b and 105b provided on the lower portions of the lens plates 104 and 105 are the groove portions 2 provided on the case 2.
It slides in a (groove). The arms 106 and 107 have a shaft 109.
The upper part of the shaft 109 is slidably fitted in the groove 3a provided on the inner surface of the cover 3. Also, axis 1
A spring 110 is attached to 09 to the arms 106, 10
Energize 7 in the closing direction. The hole 108a at the center of the arm 108 is rotatably fitted to a shaft 111 provided in the case 2, one abuts on the shaft 109, and the other a lever 22b.
Abut. Then, the arm 10 is moved according to the movement of the lever 22.
8 causes the shaft 109 to move, and the arm 10
Lens plates 104 and 105 are changed by changing the opening angles of 6 and 107.
The position of is changed to change the light distribution angle of the illumination light emitted from the strobe, that is, the strobe is zoomed. Arm 10
8 is urged to be pressed against the lever 22 by the urging force of the spring 110 hung on the arms 106 and 107.

FIG. 3 is an explanatory diagram of the operation of the arms 106, 107 and the arm 108 for driving the lens plates 104, 105. The arm drawn by the solid line shows the state when the gear 21 is stopped at the wide-angle position, and the arm shown by the dotted line shows the state when the gear 21 is stopped at the telephoto position. When the gear 21 is stopped at the standard position, the arm position is located at an intermediate position between the solid line and the dotted line.

That is, as shown in FIGS. 3 and 11, the transmission lever 22 is swung based on the cam displacement of the cam portion 21a of the gear 21 which is rotationally transmitted from the motor M2, and the pushing portion 22b is moved.
Pushes the arm 108 against the spring 110,
Lens plates 104 and 105 are changed by changing the opening angles of 6 and 107.
Are moved back and forth along the front surface of the prism 103.

In FIGS. 1 and 2, reference numeral 33 is a red-eye preventing lamp, and 34 is a reflecting shade for collecting the light, which is fixed to the back side of the panel 4. As described above, the case 2 is divided into three rooms, and 101, 102, 103, 1 are provided in the central part.
A light emitting part including the members 04, 105, and 4 is arranged on its left side, and its driving members 18 to 24 are arranged, and on its right side, a red-eye preventing lamp 33 and a reflecting shade 34 are arranged. 40 is a lead wire, and through the bearing 14,
It extends to one side portion of the case 2 and is connected to the lamp 33, and further connected to the xenon tube 101 through the elongated hole 2a.

Next, referring to FIG. 4, a planetary gear mechanism for transmitting the output of the motor M2 will be described. The output of the motor M2 is transmitted to the sun gear 53 via the gear 51 and the transmission gear 52. A planetary lever 54, which is frictionally coupled, is coupled to the central axis of the sun gear 53, and a planetary gear 55 is pivotally supported by the planetary lever 54. Therefore, the sun gear 53, the planetary lever 54, and the planetary gear 55 form a planetary gear mechanism.

Reference numeral 56 denotes a mirror drive gear, which is not shown in detail, but the main mirror (which switches light in the direction of the finder system and the image pickup device using a cam mechanism by one-way rotation of the mirror drive gear 56 ( The quick return mirror 60 moves from the observing position (down position) shown in FIG. 4 to the photographing retreat position (up position) and further returns to the observing position.

When the motor M2 rotates in the reverse direction, the sun gear 53 rotates counterclockwise to mesh the planet gear 55 with the gear 6, and in the normal rotation, the planet gear 55 meshes with the mirror drive gear 56. FIG. 7 is a circuit block diagram of this embodiment.

The PRS is for performing camera control. For example, a CPU (central processing unit), ROM, RAM,
It is a one-chip microcomputer (hereinafter, abbreviated as a microcomputer) having an A / D conversion function. The microcomputer PRS controls a series of operations of the camera such as an automatic exposure control function, an automatic focus detection function, a strobe control function, film winding, and a mechanical charge function according to a camera sequence program stored in the ROM.

Therefore, the microcomputer PRS is provided with the synchronous communication signals SO, SI, SCLK, and the communication selection signals CLCM, CS.
The DR and CDR are used to communicate with the peripheral circuits and the lens in the camera body to control the operation of each circuit and lens.

SO is a data signal output from the microcomputer PRS, SI is a data signal output from the microcomputer PRS, and SCLK is a synchronization clock of the signals SO and SI. LCM is a lens circuit, and when the camera is in operation, power is supplied to the lens power supply terminal and the microcomputer PR
When predetermined data is transmitted from the signal SO in synchronization with the synchronization clock SCLK output from S, the lens circuit LCM causes the synchronization clock SCLK to pass through the camera-lens indirect point.
Each buffer signal of the signal SO is output to the lens. Similarly, a signal such as the lens focal length at that time from the lens is output as a signal SI, and the microcomputer PRS inputs the signal SI as data from the lens in synchronization with the synchronization clock SCLK.

SDR is a drive circuit of a line sensor device for focus detection composed of CCD or the like, which is selected when the communication selection signal CSDR is "H", and signals SO, SI,
It is controlled using the clock SCLK.

SPC is an exposure control photometric sensor for receiving light from a subject through the taking lens, and its output S
The SPC is input to the analog input terminal of the microcomputer PRS, A / D converted, and then used for automatic exposure control (AE) according to a predetermined program.

DDR is a circuit for switch detection and display, and is selected when the signal CDRD is "H", and the signal S is selected.
Microcomputer PR using O, SI and synchronous clock SCLK
It is controlled by S. FMS is a film feed detection circuit,
The detection output is input to the circuit DDR as the signal SFMS.
MES is a mechanical phase detection circuit such as shutter and mirror,
The detection output is input to the circuit DDR as the signal SMES.

FLS detects the presence or absence of pop-up or zoom phase by a strobe phase detection circuit and inputs a signal SFLS to the circuit DDR. X is a switch that is turned on when the shutter front curtain travel is completed, and CN2 is a switch that is turned on when the shutter rear curtain travel is completed.

That is, the display of the display member DSP of the camera is switched based on the data sent from the microcomputer PRS, and switches or status signals interlocking with various states of the camera are notified to the microcomputer PRS by communication.

The switches SW1 and SW2 are interlocked with a release button (not shown). The switch SW1 is turned on when the release button is pushed down in the first stage, and the switch SW2 is turned on when the release button is pushed down to the second stage. . As will be described later, the microcomputer PRS performs photometry, automatic focus adjustment, strobe pop-up, and red-eye prevention light emission when the switch SW1 is turned on, and exposure control, strobe light emission, and film winding are triggered by turning on the switch SW2. S
W3 is a switch for detecting the completion of strobe pop-up, and detects the movement of the lever 11 described above. M
Reference numeral 1 is a film feeding motor, M2 is a mirror up / down, shutter charge, strobe pop-up, and zoom drive motor, each drive circuit MDR
Forward rotation and reverse rotation are controlled by 1 and MDR2. The signals M1F, M1R, M2F and M2R input from the microcomputer PRS to the drive circuits MDR1 and MDR2 are signals for motor control.

MG1 and MG2 are magnets for starting travel of the shutter front and rear curtains, respectively, and are signals SMG1 and SMG.
2, the amplifier transistors TR1 and TR2 are energized and the shutter control is controlled by the microcomputer PRS.

LAMP is a lamp for preventing red eye and has a signal S
The LAMP and the amplification transistor TR3 are energized, and the emission control is performed by the microcomputer PRS. FLSH is a strobe circuit including a main capacitor and a xenon tube, and is controlled by the microcomputer PRS via a light emission signal FS, a light emission stop signal F0, a charge start signal SC, and a charge completion signal CF. S
W4 is a switch indicating whether or not the red-eye prevention mode is set. The operation of the camera having the above configuration will be described with reference to the flowchart of FIG. When a power switch (not shown) is turned on, power supply to the microcomputer PRS is started, and the microcomputer PRS starts executing the sequence program stored in the ROM. When the execution of the program is started by the above operation, the switch S is turned on by pressing the release button in the first step through step # 1.
If W1 is detected and SW1 is off, step #
In step 3, the flag variables for control set in the RAM in the microcomputer PRS are all cleared and initialized.

Steps 2 and 3 are repeatedly executed until the switch SW1 is turned on. When the switch SW1 is turned on, the process proceeds to step # 4. Step # 4
Then, the photometric subroutine for exposure control is executed. The microcomputer PRS is an output S of the photometric sensor SPC shown in FIG.
The SPC is input to the analog input terminal to perform A / D conversion, and the optimal shutter control value and aperture control value are calculated from the digital photometric value, and the necessity of strobe is determined to the predetermined address of RAM. Store. Then, in step # 5, the AF operation is performed.

If a strobe is required, the process proceeds to step # 7, the focal length of the mounted lens is introduced from the lens circuit, and stored in the RAM of the microcomputer PRS. If the strobe is not necessary, the process proceeds to step # 15 and waits for the release operation. Next, in step # 8, the motor M
2 is reversed, the gears 6 to 8 are rotated to release the tension by the tension lever 12 and the strobe is raised, and at the same time, the gear 9 and members 18 to 21 are rotated to swing the transmission lever 22. Then, the holder 27, the xenon tube 101, the reflection shade 102 and the like are moved to start changing the irradiation angle.

Next, the process proceeds to step # 9, and it is detected whether or not the strobe has gone up by turning on the switch SW3. When the completion of the up is detected, step # 1
Move to 0. In step # 14, it is judged whether or not the focal length of the lens detected in step # 7 corresponds to the strobe irradiation angle. If the above correspondence is satisfied, the process proceeds to step # 11, and the motor M2 stops reverse rotation. That is, as described above, the reverse operation of the motor M2 starts the strobe up operation and the operation of changing the irradiation angle at the same time, and the reverse operation of the motor M2 is stopped by detecting the completion of both operations. The detection board 32
Has a pattern corresponding to the focal length (cam phase), and the zoom state of the strobe can be detected by sliding the contact piece 31 on the pattern.

Next, at step # 12, it is determined whether or not the strobe has been charged. If the charging is not completed, the routine proceeds to step # 13, where the microcomputer PRS outputs the strobe charging start signal SC to start the charging and when the charging is completed, the charging completion signal CF is generated and the routine proceeds to step # 14.
In step # 14, it is determined whether or not the switch SW4 is in the red-eye prevention mode. If the red-eye prevention mode is not set, move to step # 17,
If the red-eye prevention mode is set, the process proceeds to step # 16.

When the red-eye prevention mode is set, the lamp LAMP (red-eye prevention lamp 33) is turned on by the "H" signal of the signal SLAMP of the microcomputer PRS shown in FIG. 7, illuminates the object, and narrows the pupil to prevent red-eye. . Next step # 17
Then, the state of the switch SW2, which is turned on when the release button is pressed in the second step, is detected. If the switch SW2 is off, the process waits here. If the switch SW2 is turned on, the process proceeds to step # 18. In step # 18, it is determined whether or not the time required to narrow the pupil has elapsed. When the red-eye prevention mode is not set in step # 14, the timer time is "0", and therefore the process immediately proceeds to step # 19. If the required time has not passed, the lamp LAMP is kept on until the time passes. When the required time has passed, the process proceeds to step # 19.

On the other hand, when it is determined in step # 6 that the strobe is not required, the process proceeds to step # 15, and it is determined whether the switch SW2 is on. When the switch SW2 is turned on, the process proceeds to step # 25 and the release operation is performed. The motor M2 rotates in the normal direction by the signal M2F of the microcomputer PRS, the planet gear 55 is meshed with the mirror drive gear, and the mirror-up operation is performed. When the mirror up is completed, the microcomputer P is passed through the input phase detection circuit MES.
The signal SI is sent to RS, and the motor M2 stops. Next, the shutter front curtain magnet MG1 is excited by the signal SMG1 of the microcomputer PRS, and the shutter front curtain travels by the spring force to expose the film. After that, the signal SMG2 is generated with a predetermined time delay based on the shutter time calculated in step 4, the shutter rear curtain magnet MG2 is excited, and the shutter rear curtain travels. When a strobe is required, this shutter time is set at the strobe synchronization time. If a strobe is required, the motor M2 is rotated in the forward direction to perform the mirror-up operation in step # 19, and the front curtain magnet MG1 is excited to drive the shutter front curtain.
Then, the process proceeds to step # 20, and it is determined which X-contact is turned on when the traveling of the shutter front curtain is completed. When the X contact is turned on, a signal is sent to the microcomputer PRS via the circuit DDR, and the strobe emits light (flashes the xenon tube 101) in step # 21. When the strobe emits light, a strobe emission stop signal Fo is generated based on the output of a light control circuit (not shown), and the strobe emission is stopped. Then, the process proceeds to step # 22, and it is determined whether or not the traveling of the shutter rear curtain is completed. When the trailing curtain has finished running, switch CN
2 is turned on, a signal is transmitted to the microcomputer PRS via the circuit DDR, and the routine proceeds to step # 23. In step # 23, the motor M2 is normally rotated based on the signal M2F to perform mirror down and shutter charge. When the mirror down and the shutter charge are completed, the mechanical phase detection circuit ME
A signal is transmitted to the microcomputer PRS via S and the motor M
The forward rotation of 2 stops. Next, the process proceeds to step # 24 to feed the film. The motor M1 normally rotates based on the signal MIF of the microcomputer PRS to wind up the film.

When the film for one frame is wound up, a signal is transmitted to the microcomputer PRS through the film signal detection circuit FMS, and the normal rotation of the motor M1 is stopped. The motor M1 is rotated in the reverse direction based on the signal MIR to rewind the film. The steps # 23 and # 24 do not necessarily need to be performed in series and may be performed at the same time. When the above steps are completed, the camera prepares for the next shooting.

Next, a second embodiment of the present invention will be described. The strobe optical system used in the second embodiment has the same configuration as that described with reference to FIGS.

First, the strobe zoom mechanism will be described. Figure 1
2, FIG. 13, FIG. 14, FIG. 15, and FIG. 17 are explanatory views of the strobe zoom mechanism of this embodiment. FIG. 17 is a perspective view of a strobe according to this embodiment. 12 is a top view of the strobe according to the present embodiment, FIG. 13 is a side view of the strobe according to the present embodiment, FIG. 14 is a front view of the strobe according to the present embodiment, and FIG. 15 is a zoom position of the strobe according to the present embodiment. FIG. 3 is an explanatory diagram of a pattern of a phase substrate for use in Reference numeral 2 is a case that forms the skeleton of a strobe unit, and is fixed to a camera body (not shown). Reference numeral 3 is a strobe cover that forms the appearance of a strobe unit and is fixed to the case 2. A panel 4 covers the entire surface of the strobe unit and protects the strobe optical section.

Reference numeral 101 is a xenon tube, and a reflecting shade 102
It is fixed with rubber (not shown). 103 prism.
The reflection shade 102 is brought into close contact with the prism 103, and the prism 103 is further adhered and fixed to a predetermined position of the case 2. 104 and 105 are lens plates. The shafts 104a and 105a are respectively on the upper part, and the protrusions 104b and 105 are on the lower part.
b Prepare. The shafts 104a and 105a are arm 1 respectively.
06 and 107 are rotatably fitted, and a portion protruding from the arm slides in a groove 3b formed inside the cover 3. Further, the protrusions 104b and 105b provided on the lower portions of the lens plates 104 and 105 slide on the groove 2a (groove) provided on the case 2. The arms 106 and 107 are rotatably fitted to the shaft 109, and the upper part of the shaft 109 is covered by the cover 3.
Is slidably fitted in the groove 3a provided on the inner surface of the. A spring 110 is attached to the shaft 109 and the arm 10
6 and 107 are urged in the closing direction. The hole 108a at the center of the arm 108 is rotatably fitted to the shaft 111 provided in the case 2, and one of them abuts on the shaft 109 and the other abuts on the lever 205. Then, the arm 108 swings according to the movement of the lever 205 to move the shaft 109 and change the opening angle of the arms 106 and 107 to change the lens plate 10.
By changing the positions of 4 and 105, the light distribution angle of the strobe is changed, that is, the strobe is zoomed. The arm 108 is urged to be pressed against the lever 205 by the urging force of the spring 110 hung on the arms 106 and 107.
The lever 205 has a protrusion 205a that restricts the lever 205 from rotating by being slidably fitted in the groove 2k provided in the case 2. The lever 205 is formed with a groove portion that fits into the spiral groove 202b provided on the gear shaft 202.

A stroboscopic zoom motor 201 rotationally drives a gear shaft 202. On the gear shaft 202, a gear portion 202a that meshes with a pinion of the motor 201,
The shaft portion 202b is formed with a spiral groove. The protrusion of the lever 205 is slidably fitted in the groove 2k of the case 2, and the groove and the shaft 202b provided in the lever 205 are fitted.
When the gear shaft 202 rotates in a state where the groove portion on the spiral is engaged, the lever 205 moves back and forth along the gear shaft 202 by the rotation of the motor 201 to perform zoom driving of the strobe.

A contact piece 203 is attached to the lever 205 so as to contact a pattern provided on the substrate 204,
Used to determine the phase of lever 205.

FIG. 12 is an explanatory diagram of the operation of the arms 106 and 107 and the arm 108 that drive the lens plates 104 and 105. A state in which the arm 108 drawn with a solid line is stopped at the wide-angle position of the lever 205 is shown. At this time, the contact piece 203 is on the wide-angle dotted line 103a provided on the substrate 204 shown in FIG. Located in. In FIG. 12, the arm 108 indicated by the dotted line is the lever 205.
Shows the state when stopped at the telephoto position of
The contact piece 203 is located on a wide-angle dotted line 203 provided on the substrate 204 shown in FIG. The position of the arm 108 when the gear 21 is stopped at the standard position is approximately the middle position between the solid line and the dotted line. That is, FIG.
As shown in 2, 13, 14, 15, and 17, the motor 201
The lever 205 is driven back and forth by the gear shaft 202 that is transmitted in rotation from the lever 108, and the lever 108 is swung accordingly and the arm 108 pushes the shaft portion 109 against the spring 110 to change the opening angle of the arms 106 and 107. Lens plate 10
4, 105 are reciprocated along the front surface of the prism 103. Here, each of the members 201 to 206 is a part of the connecting means and constitutes one element of the driving direction changing member.

Next, the circuit block of this embodiment will be described. FIG. 16 is a circuit block diagram of this embodiment. PR
S is for performing camera control, and is, for example, a CPU (central processing unit), a ROM, a RAM, and a one-chip microcomputer (hereinafter, abbreviated as a microcomputer) having an A / D conversion function. The microcomputer PRS controls a series of operations of the camera such as an automatic exposure control function, an automatic focus detection function, a strobe control function, film winding, and a mechanical charge function according to a camera sequence program stored in the ROM.

For this purpose, the microcomputer PRS uses the synchronous communication signals SO, SI, SCLK and the communication selection signals CLCM, CS.
The DR and CDR are used to communicate with the peripheral circuits and the lens in the camera body to control the operation of each circuit and lens. SO is a data signal output from the microcomputer PRS,
SI is a data signal output from the microcomputer PRS, SC
LK is a synchronous clock of the signals SO and SI. LCM
Is a lens circuit, and when the camera is in operation, power is supplied to the lens power supply terminal and predetermined data is transmitted from the signal SO in synchronization with the synchronization clock SCLK output from the microcomputer PRS. Each buffer signal of the synchronous clock SCLK and the signal SO is output to the lens via the indirect point of the lens. Similarly, the signal S from the lens such as the lens focal length at that time
I, and the microcomputer PRS outputs the synchronization clock SCL.
The signal SI is input as data from the lens in synchronization with K.

SDR is a drive circuit of a line sensor device for focus detection including a CCD or the like, which is selected when the communication selection signal CSDR is "H" and signals SO, SI,
It is controlled using the clock SCLK. SPC is an exposure control photometric sensor that receives light from a subject through a taking lens, and its output SSPC is input to an analog input terminal of a microcomputer PRS, and after A / D conversion, automatic exposure control according to a predetermined program ( Used for AE). D
DR is a circuit for switch detection and display, and is a signal C
When the DDR is "H", it is selected and controlled by the microcomputer PRS using the signals SO and SI and the synchronous clock SCLK. FMS is a film feeding detection circuit, and the detection output is input to the circuit DDR as a signal SFMS. MES is a mechanical phase detection circuit such as a shutter and a mirror, and the detection output is input to the circuit DDR as a signal SMES.

FLS detects the presence or absence of pop-up or a zoom phase by a strobe phase detection circuit and inputs a signal SFLS to the circuit DDR. X is a switch that is turned on when the shutter front curtain travel is completed, and CN2 is a switch that is turned on when the shutter rear curtain travel is completed. That is, the display of the display member DSP of the camera is switched based on the data sent from the microcomputer PRS, and switches or status signals interlocking with various states of the camera are communicated to the microcomputer PRS. The switches SW1 and SW2 are switches interlocked with a release button (not shown). The switch SW1 is turned on when the release button is pushed down in the first stage, and the switch SW2 is turned on when the release button is pushed down to the second stage. SW4 is the same as in the first embodiment. As will be described later, the microcomputer PRS performs photometry and automatic focus adjustment when the switch SW1 is turned on, and exposure control, stroboscopic light emission, and film winding are triggered by turning on the switch SW2.
M1 is a film feed motor, M2 is a mirror up / down and shutter charge, M201 is a strobe zoom drive motor, and each drive circuit MDR
The forward rotation and the reverse rotation are controlled by 1, MDR2 and MDR201. From the microcomputer PRS to the drive circuit MDR1, M
Signals M1F and M1 input to DR2 and M201
R, M2F, M2R, M201R and M201F are signals for motor control.

MG1 and MG2 are magnets for starting travel of the shutter front and rear curtains, respectively, and are signals SMG1 and SMG.
2, the amplifier transistors TR1 and TR2 are energized and the shutter control is controlled by the microcomputer PRS. FLSM
Is a strobe circuit including a main capacitor and a xenon tube. The light emission signal FS, the light emission stop signal F0, and the charge start signal S
C, controlled by PRS via charge complete signal CF.

Description of Operation Flowchart Next, the operation of the camera in the above configuration will be described with reference to the flowchart of FIG.

When a power switch (not shown) is turned on, power supply to the microcomputer PRS is started, and the microcomputer PRS is turned on.
The execution of the sequence program stored in M is started. When the execution of the program is started by the above operation, the switch SW1 is detected when it is turned on by pressing the release button in the first stage through step # 1.
When it is off, the process proceeds to step # 3 and RA in the microcomputer
All control flag variables set in M are cleared and initialized.

Steps 2 and 3 are repeatedly executed until the switch SW1 is turned on. When the switch SW1 is turned on, the process proceeds to step # 4. Step # 4
Then, the photometric subroutine for exposure control is executed. The microcomputer PRS inputs the output SSPC of the photometric sensor SPC shown in FIG. 16 to the analog input terminal to perform A / D conversion, and from the digital photometric value, the optimum shutter control value,
The aperture control value is calculated, and the necessity of using the strobe is determined and stored in a predetermined address of the RAM. Then, in step # 5, the AF operation is performed.

If a strobe is required, the process proceeds to step # 7, the focal length of the mounted lens is introduced from the lens circuit, and stored in the RAM of the microcomputer PRS. If the strobe is not necessary, the process proceeds to step # 13 and waits for the release operation. In step # 8, it is determined whether or not the focal length of the lens detected in step # 7 corresponds to the strobe irradiation angle. If the above correspondence is obtained, the process proceeds to step # 10. When the correspondence is not established, the motor M201 is energized so that the correspondence can be established. A pattern corresponding to the focal length is formed on the detection substrate 204, and the zoom state of the strobe can be detected by sliding the contact piece 203 on the pattern.

Next, in step # 11, it is determined whether or not the strobe has been charged. If the charging is not completed, the routine proceeds to step # 12, where the microcomputer PRS outputs the strobe charging start signal SC to start charging, and when the charging is completed, the charging completion signal CF is generated and the routine proceeds to step # 16.

Next, in step # 16, the state of the switch SW2 which is turned on when the release button is pressed in the second step is detected. If the switch SW2 is off, the process waits here. If the switch SW2 is turned on, the process proceeds to step # 17. On the other hand, when it is determined in step # 6 that the strobe is not necessary, the process proceeds to step # 13, and it is determined whether the switch SW2 is on. When the switch SW2 is turned on, the process proceeds to step # 15 and the release operation is performed. The motor M is generated by the signal M2F of the microcomputer PRS.
2 rotates normally, and the mirror-up operation is performed. When the mirror up is completed, the signal SI is sent to the microcomputer PRS via the input phase detection circuit MES, and the motor M2 is stopped. Next, the shutter front curtain magnet MG1 is excited by the signal SMG1 of the microcomputer PRS, and the shutter front curtain travels by the spring force to expose the film. After that, the signal SMG2 is generated with a predetermined time delay based on the shutter time calculated in step 4, the shutter rear curtain magnet MG2 is excited, and the shutter rear curtain travels. When a strobe is required, this shutter time is set at the strobe synchronization time. If a strobe is required, the motor M2 is rotated in the forward direction to perform the mirror-up operation in step # 17, and the front curtain magnet MG1 is excited to drive the shutter front curtain. Then, the process proceeds to step # 18, and it is determined whether or not the X-contact is turned on when the traveling of the shutter front curtain is completed. X
When the contact is turned on, a signal is sent to the microcomputer PRS via the circuit DDR, and the strobe emits light (flashes the xenon tube 101) in step # 19. When the strobe emits light, the strobe emission stop signal Fo is generated based on the output of the light control circuit (not shown), and the strobe emission is stopped. Next, the process proceeds to step # 20, and it is determined whether the traveling of the shutter rear curtain is completed. When the running of the rear curtain is completed, the switch CN2 is turned on and the microcomputer P is connected via the circuit DDR.
A signal is transmitted to the RS and the process proceeds to step # 21. In step # 21, the motor M2 is normally rotated based on the signal M2F to perform mirror down and shutter charge. When the mirror down and the shutter charge are completed, a signal is transmitted to the microcomputer PRS via the mechanical phase detection circuit MES, and the normal rotation of the motor M2 is stopped. Then step # 22
Transfer to film feed. The motor M1 normally rotates based on the signal MIF of the microcomputer PRS to wind up the film.

When the film for one frame is wound up, a signal is transmitted to the microcomputer PRS via the film signal detection circuit FMS, and the normal rotation of the motor M1 is stopped. The motor M1 is rotated in the reverse direction based on the signal MIR to rewind the film. The steps # 23 and # 24 do not necessarily need to be performed in series and may be performed at the same time. When the above steps are completed, the camera prepares for the next shooting.

[0086]

According to the present invention, it is possible to achieve a flash light emitting device capable of efficiently changing the irradiation angle of illumination light from a light source and an optical apparatus including the same, because the volume of the working range of the parts can be small. You can

In addition, according to the present invention, it is possible to provide an optimum optical member driving device in a flash light emitting device having an optical system that requires a small operation range volume by a moving part for changing the irradiation angle.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts of a first embodiment of the present invention.

FIG. 2 is a sectional view of the first embodiment of the present invention seen from above.

FIG. 3 is an explanatory diagram of a link mechanism according to the first embodiment of the present invention.

FIG. 4 is a side view of the mechanism according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram of a strobe-up operation according to the first embodiment of the present invention.

FIG. 6 is an explanatory view of a tension lever according to the first embodiment of the present invention.

FIG. 7 is a block diagram according to the first embodiment of the present invention.

FIG. 8 is an explanatory diagram of a flowchart according to the first embodiment of the present invention.

FIG. 9 is an explanatory diagram of a cam according to the first embodiment of the present invention.

FIG. 10 is an explanatory diagram of a phase substrate according to the first embodiment of the present invention.

FIG. 11 is a cam operation diagram according to the first embodiment of the present invention.

FIG. 12 is an explanatory diagram of a link mechanism according to the second embodiment of the present invention.

FIG. 13 is a side view of the mechanism according to the second embodiment of the present invention.

FIG. 14 is a front view of the mechanism according to the second embodiment of the present invention.

FIG. 15 is an explanatory diagram of a substrate according to the second embodiment of the present invention.

FIG. 16 is a block diagram according to a second embodiment of the present invention.

FIG. 17 is a perspective view of Embodiment 2 of the present invention.

FIG. 18 is an explanatory diagram of a flowchart according to the second embodiment of the present invention.

FIG. 19 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 20 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 21 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 22 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 23 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 24 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 25 is an explanatory view of a main part of a flash light emitting device according to the present invention.

FIG. 26 is an explanatory view of a main part of a flash light emitting device according to the present invention.

[Explanation of symbols]

1 Top cover 2 Strobe unit case 3 Strobe unit cover 6-10 and 18-21 gears 11 lever 12 tension lever 13 and 16 and 23 springs 14 bearings 17 Fixed locking member 22 lever 24 restraining plate 32 substrates 33 Red-eye prevention lamp 34 Reflective shade 53 sun gear 54 Planetary lever 55 Planetary gear 56 mirror drive gear 101 xenon tube 102 reflective shade 103 prism 104 lens plate 105 lens plate 106 arm 107 arm 108 arms

Claims (4)

[Claims] 1. A light emitting tube, a first prism member arranged in front of the light emitting tube, a light emitting surface of the first prism member, and a light emitting surface of the first prism member. And a second prism member movable in the longitudinal direction of the arc tube, a connecting means connected to the second prism, and a driving means for driving the connecting means. The flash light emitting device is characterized in that the light distribution angle is changed by changing the overlapping amount of the first and second prism members when viewed from the light exit side. 2. The connecting means comprises a connecting member connected to the second prism, and a drive direction changing member connected to the connecting member to convert the rotational driving force from the driving means into a linear driving force. The flash light-emitting device according to claim 1, further comprising: 3. The connecting means includes a connecting member connected to the second prism, and a cam member connected to the connecting member and driven by the driving means. The flash light emitting device according to claim 1. 4. An optical device comprising the flash light emitting device according to claim 1. Description: