JPH04355737A - Auxiliary lamp incorporated in camera - Google Patents

Abstract

PURPOSE:To incorporate an auxiliary lamp in a camera in a compact size without making the camera itself larger in size, and also, to easily attach the lamp by separately providing the auxiliary lamp for preventing a red-eye phenomenon other than a main lamp and having such a constitution that the outer circumferential part of the lamp is directly covered with a cylindrical reflector. CONSTITUTION:It is a conventional concept that the auxiliary lamp is incorporated in the camera other than a strobe lamp in order to prevent the occurrence of the red-eye phenomenon, in this case, the lamp 6 is provided with a parabolic reflector, so that the camera itself becomes larger in size. but in this case, the outer circumferential part of the lamp 6 is directly covered with the cylindrical reflector 7. That means, the light of the lamp is efficiently radiated forward by the cylindrical reflector 7, and the light quantity is increased by about 50% as compared with the case without using the reflector 7. Then, the light quantity enough for preventing the red-eye phenomenon can be efficiently obtained even in the case of not using the conventional parabolic reflector. And also, as to the auxiliary lamp, the reflector for covering the lamp 6 with it is formed to be cylindrical, so that it can be easily attached with a holder 10 and also easily positioned, thus, it can be contained in a compact size.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary lamp built into a camera, and more particularly to the construction of an auxiliary lamp provided for red-eye prevention.

0002

2. Description of the Related Art In camera flash photography, the so-called red-eye phenomenon, in which the eyes of subjects such as people appear red, has traditionally been a problem, but recently measures have been taken to prevent this red-eye phenomenon. In other words, the red-eye phenomenon is a phenomenon in which when a strobe is used on a human or animal, the strobe light enters the eyeball through the pupil, and this light is reflected from the blood vessels in the eyeball, causing the eye to appear red. Therefore, conventionally, in order to prevent the above-mentioned red eye, a weak light is emitted in advance (pre-flash) before the actual shooting to reduce the diameter of the subject's pupil and reduce the incidence of strobe light into the pupil. .

[0003] When the pre-emission is performed using a lamp built into the camera, it has been proposed that one strobe lamp, such as a xenon tube, be used to emit light using two types of capacitors.According to this, In synchronization with the shooting button, a small-capacity capacitor is used to pre-flash the strobe lamp, and after the subject's pupil diameter is reduced, a large-capacity capacitor is used to emit the main flash.

0004

[Problem to be Solved by the Invention] However, when a single strobe lamp is used to emit pre-flash to prevent the red-eye phenomenon as described above, there is an advantage that the single lamp can also serve as the pre-flash. However, there is a problem in that charging and discharging control of large and small capacitors becomes complicated.

On the other hand, in order to prevent red-eye, it has been proposed to incorporate an auxiliary lamp in addition to the strobe lamp into the camera, but this case has the following problems. That is, FIG. 4 shows a state in which the auxiliary lamp is held in a holder inside the camera, and in the figure, the lamp (tube) 1 is equipped with a reflector 2 whose cross section is a parabola, and this reflector 2 is held in the holder. It will be held at 3. Then, if the lamp 1 is electrically connected by the connecting pin 4,
The lamp 1 becomes capable of emitting light, and the emitted light is collected by the reflector plate 2 and radiated toward the front.

However, as can be understood from FIG. 4, the reflector 2 has a parabolic shape that spreads toward the front, so when this auxiliary lamp is built into the camera, the camera itself must be made larger. However, there was a problem in that it was not possible to achieve a reduction in size and weight. Further, when the auxiliary lamp is attached and fixed, since the reflector plate 2 has a parabolic shape, it is difficult to position it and the adjustment thereof is complicated.

The present invention has been made in view of the above problems, and its purpose is to provide an auxiliary lamp separately from the strobe lamp in order to eliminate complicated light emission control, and in this case, the camera itself To provide an auxiliary lamp with a built-in camera, which can be built in compactly without increasing the size of the camera, and which is easy to install.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the auxiliary lamp built into the camera according to the present invention is an auxiliary lamp built into the camera separately from the main lamp, and which is a lamp (tube). It is characterized by a structure in which the outer periphery is directly covered with a cylindrical reflecting plate.

[0009]

[Operation] According to the above configuration, the lamp light is efficiently radiated to the front side by the cylindrical reflector, and the amount of light radiated to the front side is approximately 50% compared to the case without the reflector.
To increase. Therefore, the amount of light for preventing red-eye can be efficiently obtained without using a conventional parabolic reflector. Since the auxiliary lamp has a cylindrical reflector that covers the lamp, it is easy to attach and position the auxiliary lamp to the holder, and it can be compactly stored in a predetermined location within the camera.

0010

[Embodiment] Fig. 1 shows the configuration of an auxiliary lamp built into a camera according to an embodiment.
will be established. This reflector plate 7 is formed using a white plastic material, and in the embodiment, as shown in FIG. 2, it has a cylindrical shape by covering the entire outer circumference of the lamp 6. A reflector 7 is also provided at the rear end of the lamp 6, and the connection pin 8 of the lamp 6 is connected to the reflector 7 at the rear end.
It will pass through a hole drilled in the.

In this embodiment, this auxiliary lamp has a holder 1 having a holding hole 10a whose inner diameter is the outer diameter of the reflecting plate 7.
It will be held at 0. Therefore, the lamp 6 is attached to the holder 10 by inserting and fitting the reflector plate 7 into the holding hole 10a of the holder 10, whereby a secure fixed holding state can be obtained.

FIG. 3 shows an exploded perspective view of the auxiliary lamp placed inside the camera, with the case removed. In the figure, a lens barrel 13 having a photographic lens 12 is provided so as to be able to move forward and backward to enable zoom photography, and the upper part of this lens barrel 13 includes a finder aperture 14 and a light projector 15a for autofocus (AF). and a light receiving section 15b. Further, on the right side of the figure, a xenon tube 16 for strobe light emission as a main lamp is provided together with a semi-cylindrical reflector plate 17.

The above-mentioned auxiliary lamp is disposed on the line connecting the lens barrel 13 and the xenon tube 16, and a reflector is attached to the holder 10 attached between the lens barrel 13 and the xenon tube 16. Lamp 6 covered by 7
is inserted. At this time, since the lamp 6 is fitted into the holder 10 and does not move, there is no need to position the lamp 6 itself, and the lamp 6 can be easily attached to the position set by the holder 10.

The auxiliary lamp installed in this way is used for pre-flashing before flash photography to prevent red-eye, but it can also be used for other purposes, such as in passive autofocus control. It can also be applied to emitting auxiliary light when outside light becomes dark. According to a light emission experiment using the auxiliary lamp of the example, it was confirmed that the light amount increased by about 50% compared to the case where the reflector plate 7 was not provided, and it was confirmed that sufficient light amount could be obtained for the above-mentioned pre-light emission and auxiliary light emission. It is possible.

In the above embodiment, the reflecting plate 7 is made of a white plastic material, but it is not limited to this, and may be made of other colors such as silver, which have a light reflecting effect, or may be made of a material other than plastic. Alternatively, it may be coated with a metal plate or a thin film coating that has a light reflecting effect, for example.

[0016]

[Effects of the Invention] As explained above, according to the present invention,
The auxiliary lamp is built in separately from the strobe lamp, and the outer periphery of the lamp is directly covered with a cylindrical reflector, so the auxiliary lamp can maintain the necessary amount of light without increasing the size of the camera itself. It is possible to incorporate it compactly.

Furthermore, since the reflecting plate, which is the lamp envelope, is cylindrical, there are advantages in that the auxiliary lamp can be easily attached and its positioning etc.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an auxiliary lamp built into a camera according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a side view.

FIG. 2 is a perspective view showing the configuration of a reflector in the auxiliary lamp of the embodiment.

FIG. 3 is an exploded perspective view showing the mounting positional relationship of auxiliary lamps inside the camera.

FIG. 4 is a partially sectional view showing a state in which a conventional auxiliary lamp is attached to a holder.

[Explanation of symbols]

1,6...Lamp, 2,7...Reflector plate, 3,10...Holder, 13... Lens barrel, 16...Xenon tube.

Claims (1)

[Claims] 1. An auxiliary lamp built into a camera, which is built into the camera separately from the main lamp, and characterized in that the outer periphery of the lamp is directly covered with a cylindrical reflector.