TWI727755B - Optical device and prism module thereof - Google Patents

Abstract

A prism module includes a first prism, a second prism and a third prism. The first prism includes a first surface, a second surface, a third surface and a fourth surface. The second prism includes a fifth surface, a sixth surface and a seventh surface, wherein the seventh surface of the second prism is adjacent to the third surface of the first prism. The third prism includes an eighth surface, a ninth surface and a tenth surface, wherein the eighth surface of the third prism is attached to the sixth surface of the second prism. A first light beam emitted by an object passes through the prism module, and the first light beam before entering the prism module and the first light beam after leaving the prism module are non-coaxial. The invention further provides an optical device including the above-described prism module.

Description

Optical device and its optical module (2)

The invention relates to an optical device and its optical module, in particular to a laser rangefinder and its optical module.

Please refer to Fig. 1, the conventional rangefinder 10 includes an objective lens group (not shown), an optical module 11, an organic light emitting diode 12, a light emitter 13, and a light receiver (not shown) (Shown) and an eyepiece set (not shown). The lens module 11 is disposed between the objective lens group and the eyepiece lens group, and includes a first lens 14, a second lens 15, and a third lens 16, wherein the first lens 14 is attached to The second ridge 15 is, and the third ridge 16 is adjacent to the second ridge 15. The organic light emitting diode 12 and the light emitter 13 are arranged on the side close to the first beam 14. Among them, the third ridge 16 is a roof ridge ridge, and the second ridge ridge 15 and the third ridge ridge 16 form a different Han ridge group.

During operation, a first light beam A emitted by an object (not shown) passes through the objective lens group, the second lens 15, the third lens 16 and the eyepiece group in order for the user to view the image of the object . A second light beam B emitted by the organic light emitting diode 12 is reflected by a mirror 17, and passes through the first beam 14, the second beam 15, the third beam 16 and the eyepiece group in order for use The viewer watches the image information generated by the organic light emitting diode 12 and the crosshairs. A third light beam C emitted by the light transmitter 13 reaches the object through the other mirror 18, the first lens 14, the second lens 15 and the objective lens group, and is reflected by the object back to the light receiver, In order to calculate the distance of the object from the rangefinder 10.

In the above structure, the roof ridges in the ridge module 11 (that is, the third ridges 16) and The Biehan group (consisting of the second 15 and the third 16) generally has the problem of light leakage, which affects the manufacturing cost and imaging quality of the rangefinder 10 equipped with the module 11. If the objective lens group and the eyepiece group in the rangefinder 10 need to adopt a non-coaxial design, the lens module 11 will have a relatively large volume, resulting in a large volume of the rangefinder 10 equipped with the lens module 11. The second light beam B is reflected more times when it passes through the beam module 11, which causes the brightness of the image generated by the organic light emitting diode 12 to be reduced. In addition, the effective diameter of the third light beam C emitted by the light emitter 13 and the effective diameter of the second light beam B emitted by the organic light emitting diode 12 interfere with each other, resulting in the energy of the third light beam C emitted by the light emitter 13 Weaken.

In view of this, the object of the present invention is to provide an optical device, which reduces the volume and improves the imaging quality by using a novel structure of the module, while ensuring the brightness of the image produced by the display unit and the light emitted by the light emitter The energy of the beam is high enough.

One of the embodiments of the present invention has a die-cutting module, which includes a first die-cutting die, a second die-cutting die, a third die-cutting die, and a first film. The first face includes a first face, a second face, a third face, and a fourth face, wherein the first face, the third face, the second face and the fourth face are adjacent in sequence, so that the The first surface is opposite to the second surface, and the third surface is opposite to the fourth surface. The second ridge includes a fifth side, a sixth side, and a seventh side, wherein the fifth side is adjacent to the sixth side and the seventh side, respectively, and the seventh side of the second ridge is adjacent to On the third side of the first 稜鏡. The third ridge includes an eighth side, a ninth side, and a tenth side. The eighth side is adjacent to the ninth and tenth sides, respectively, and the eighth side of the third ridge faces On the sixth side of the second 稜鏡. Wherein, a first light beam emitted by an object enters the first beam from the first surface, is reflected by the fourth surface, and enters the second beam through the third surface and the seventh surface in sequence, and is The fifth surface reflects, leaves the second ridge from the sixth side, enters the third ridge from the eighth side, is sequentially reflected by the ninth and tenth sides, and passes through the eighth side In order to leave the third 鏡, where The first light beam passes through the first film and faces the seventh surface.

In another embodiment, the first ridge is a diamond ridge; wherein the first film is formed on the third surface of the first ridge.

An optical device of one embodiment of the present invention includes an objective lens group, an aforementioned lens module, and an eyepiece group. Wherein, the lens module is disposed between the objective lens group and the eyepiece group, the first light beam sequentially passes through the objective lens group, the lens module and the eyepiece group, and a central axis of the objective lens group and the eyepiece group A central axis of the eyepiece group is parallel to each other without overlapping.

In another embodiment, the optical device includes an objective lens group, a lens module, and an eyepiece group. Among them, the mold module includes a first mold, a second mold, a third mold, and a first film. The first face includes a first side, a second side, a third side, and a fourth side. The second ridge includes a fifth side, a sixth side, and a seventh side, wherein the seventh side of the second ridge is adjacent to the third side of the first ridge. The third ridge includes an eighth side, a ninth side, and a tenth side, wherein the eighth side of the third ridge faces the sixth side of the second ridge. The first film is arranged between the third surface and the seventh surface. Wherein, a first light beam emitted by an object enters the first beam from the first surface, is reflected by the fourth surface, and enters the second beam through the third surface and the seventh surface in sequence, and is The fifth surface reflects, leaves the second ridge from the sixth side, enters the third ridge from the eighth side, is sequentially reflected by the ninth and tenth sides, and passes through the eighth side So as to leave the third beam, wherein the first light beam passes through the first film and faces the seventh surface. The lens module is disposed between the objective lens group and the eyepiece group, the first light beam sequentially passes through the objective lens group, the lens module and the eyepiece group, and a central axis of the objective lens group and the eyepiece group One of the central axes is parallel to each other without overlapping.

In another embodiment, the optical device further includes a display unit, which is disposed on one side of the sixth surface of the second ridge and used to emit a second light beam, wherein the second light beam originates from the sixth surface Face enters the second face, is sequentially reflected by the seventh face and the fifth face, and passes again The sixth side leaves the second ridge, enters the third ridge from the eighth side, is sequentially reflected by the ninth and tenth sides, passes through the eighth side again to leave the third ridge Through the eyepiece group.

In another embodiment, the first film is used to reflect the second light beam and allow the first light beam to pass through the first film.

In another embodiment, the optical device further includes a light emitter and a light receiver, wherein the light emitter is used for emitting a third light beam, and the light receiver is used for receiving the third light beam reflected by the object. Beam to calculate the distance between the object and the optical device. The first film is formed on the third surface of the first frame, and is used for reflecting the third light beam and allowing the first light beam to pass through the first film.

In another embodiment, the light emitter is disposed on one side of the second surface of the first beam, and the third light beam enters the first beam from the second surface, and is sequentially blocked by the third surface. Reflects with the fourth surface, leaves the first lens from the first surface, passes through the objective lens group, leaves the optical device to reach the object, is reflected by the object and returns to the optical device, and is reflected by the object. The receiver receives.

In another embodiment, the light receiver is disposed on one side of the second surface of the first beam, and the third light beam passes through the objective lens group, leaves the optical device to reach the object, and is reflected by the object. Returning to the optical device, passing through the objective lens group again, entering the first beam from the first surface, and being reflected by the fourth surface and the third surface in sequence, and leaving the first beam from the second surface , And received by the optical receiver.

In another embodiment, the optical device further includes a light emitter and a light receiver, wherein the light emitter is used for emitting a third light beam, and the light receiver is used for receiving the third light beam reflected by the object. Light beam to calculate the distance between the object and the optical device, wherein the first film is used to reflect the second light beam and the third light beam, and allow the first light beam to pass through the first light beam One film.

10, 100: rangefinder

11, 20: 稜鏡 module

12: Organic light-emitting diode

13, 40: optical transmitter

14, 45: The first 稜鏡

15, 24: The second 稜鏡

16, 34: The third 稜鏡

17, 18: mirror

21: Fifth side

22: Sixth Side

23: Seventh side

30: display unit

31: Eighth side

32: Ninth side

33: Tenth Side

41: First side

42: second side

43: third side

44: Fourth Side

49: Optical receiver

50: lens unit

81: The first film

92: Eyepiece group

94: Objective lens group

200: Object

A: First beam

B: second beam

C: third beam

L1, L2: central axis

Figure 1 is a schematic diagram of the structure of a traditional rangefinder.

Fig. 2A is a top view of the rangefinder according to the first embodiment of the present invention.

Figure 2B is a right side view of the rangefinder according to the first embodiment of the present invention.

Fig. 3A depicts a schematic diagram of the optical path of the rangefinder in Fig. 2A with a first beam of light.

Figure 3B depicts a schematic diagram of the optical path of the first beam in the rangefinder in Figure 2B.

Figure 4A depicts a schematic diagram of the optical path of a second beam in the rangefinder in Figure 2A.

Fig. 4B depicts a schematic diagram of the optical path of the second beam on the rangefinder in Fig. 2B.

Figure 5 depicts a schematic diagram of the optical path of a distance meter with a third beam in Figure 2A.

The first embodiment of the optical device of the present invention is a rangefinder that includes two optical systems. The difference between the two optical systems is only that one optical system is equipped with a light transmitter, and the other optical system is equipped with a light receiver. As for The other components and configurations are the same. For brevity, only one of the optical systems is described in detail below.

Please refer to Figures 2A and 2B as a part of the rangefinder 100 according to the first embodiment of the present invention, which includes an objective lens group 94, a lens module 20, a display unit 30, a light emitter 40, and a The lens unit 50 and an eyepiece group 92 (the components and configurations of the other part of the rangefinder 100 are the same, the only difference is that the light transmitter 40 is changed to the light receiver 49). Among them, a first light beam A (please refer to Figures 3A-3B) emitted by an object 200 passes through the objective lens group 94, the lens module 20 and the eyepiece group 92 in sequence, and a second light beam emitted by the display unit 30 The light beam B (please refer to Figures 4A to 4B) passes through the eyepiece module 20 and the eyepiece group 92 in sequence, and a third light beam C (please refer to Figure 5) emitted by the light emitter 40 passes through the eyepiece in sequence The module 20 and the objective lens group 94 reach the object 200 and are The 200 reflects back to the rangefinder 100 and is received by the optical receiver 49. With this configuration, the user can view the image of the object 200 and the image generated by the display unit 30 through the eyepiece group 92, and know the distance of the object 200 from the rangefinder 100. The structure and operation of the rangefinder 100 are described in detail below:

The lens module 20 is disposed between the objective lens group 94 and the eyepiece lens group 92, and includes a first lens 45, a second lens 24, and a third lens 34. In the first embodiment, the first ridge 45 is a rhombus ridge, and includes a first face 41, a second face 42, a third face 43, and a fourth face 44, wherein the first face 41 An anti-reflection film is formed on the second surface 42 to allow the third light beam C to pass through, and a first film 81 is formed on the third surface 43, and the first film 81 is used to reflect the second light beam B And the third beam C, while allowing the first beam A to pass. The second ridge 24 is a triangular ridge or a right-angle ridge, and includes a fifth side 21, a sixth side 22, and a seventh side 23, wherein an anti-reflection film is formed on the sixth side 22. As shown in Figure 2B, the third ridge 34 is a triangular ridge or right-angle ridge, and includes an eighth face 31, a ninth face 32, and a tenth face 33, wherein the eighth face 31 is formed Anti-reflection film.

Specifically, the first surface 41 of the first lens 45 faces the objective lens group 94, the seventh surface 23 of the second lens 24 is adjacent to the third surface 43 of the first lens 45, and the third surface of the third lens 34 is The upper half of the eighth face 31 is adjacent to the sixth face 22 of the second lens 24, and the lower half of the eighth face 31 of the third lens 34 faces the eyepiece group 92. Since the roof ridge and other Han ridges are not used in the structure, the ridge module 20 of the present invention can avoid light leakage better than the conventional ridge module. With such a configuration, it can be ensured that the rangefinder 100 equipped with the lens module 20 has a lower manufacturing cost and a better imaging quality. As shown in Figure 2A, the display unit 30 is disposed on one side of the sixth surface 22 of the second frame 24, and the lens unit 50 is disposed between the display unit 30 and the sixth surface 22 of the second frame 24, and The light emitter 40 is arranged on one side of the second surface 42 of the first beam 45.

In the first embodiment, the display unit 30 is an organic light emitting diode (OLED) or a liquid crystal display (LCD) or other display, the first light beam A is a visible light beam, and the second light beam B is a shadow The image beam, and the third beam C is a laser beam or an invisible beam.

As shown in Figures 3A to 3B, when the first light beam A emitted by the object 200 enters the rangefinder 100, the first light beam A passes through the objective lens group 94, enters the first beam 45 from the first surface 41, and is The fourth surface 44 reflects, sequentially passes through the third surface 43 and the seventh surface 23, enters the second ridge 24, is reflected by the fifth surface 21, and leaves the second ridge 24 from the sixth surface 66. The first light beam A leaving the second beam 24 enters the third beam 34 from the upper half of the eighth surface 31, is sequentially reflected by the ninth surface 32 and the tenth surface 33, and passes through the lower part of the eighth surface 31. Half to leave the 稜鏡 module 20. Eventually, the first light beam A leaving the lens module 20 will pass through the eyepiece group 92 for the user to view the image of the object 200. It is worth noting that the first beam A before entering the lens module 20 and the first beam A leaving the lens module 20 are not coaxial. Therefore, the objective lens group 94 and the eyepiece group 92 in the rangefinder 100 can be The non-coaxial design is adopted without increasing the volume of the ridge module 20. In other words, a central axis L1 (Figure 2A) of the objective lens group 94 and a central axis L2 (Figure 2B) of the eyepiece lens group 92 are only parallel to each other without overlapping. With this configuration, the eye width of the rangefinder 100 (for example, a binocular rangefinder) can be reduced while having a smaller volume.

As shown in Figures 4A to 4B, the second light beam B emitted by the display unit 30 first passes through the lens unit 50, enters the second beam 24 from the sixth surface 22, and is sequentially reflected by the seventh surface 23 and the fifth surface 21 , And pass the sixth side 66 again to leave the second 稜鏡24. The second beam B leaving the second beam 24 enters the third beam 34 from the upper half of the eighth surface 31, is sequentially reflected by the ninth surface 32 and the tenth surface 33, and passes under the eighth surface 31. Half to leave the 稜鏡 module 20. Eventually, the second light beam B leaving the faucet module 20 will pass through the eyepiece group 92 for the user to view the image generated by the display unit 30. Compared with the conventional beam module, the second light beam B is reflected less frequently when passing through the beam module 20, thereby preventing the brightness of the image generated by the display unit 30 from being reduced.

As shown in Fig. 5, the third light beam C emitted by the light emitter 40 enters the first beam 45 from the second surface 42, is sequentially reflected by the third surface 43 and the fourth surface 44, and is reflected from the first surface 41 Leave One 稜鏡45. The third light beam C leaving the lens module 20 passes through the objective lens group 94 to reach the object 200. Finally, the third light beam C will be reflected by the object 200 back to the rangefinder 100 and received by the light receiver 49 to calculate the distance between the object 200 and the rangefinder 100. With the help of the optical module 20, the effective diameter of the third light beam C emitted by the light emitter 40 and the effective diameter of the second light beam B emitted by the display unit 30 can be prevented from interfering with each other. Compared with the conventional beam module, the energy of the third light beam C emitted by the light emitter 40 is increased.

In the second embodiment, the positions of the light emitter 40 and the light receiver 49 respectively provided in the two optical systems of the rangefinder 100 are interchanged. In other words, the light receiver 49 is arranged on one side of the second surface 42 of the first beam 45. During operation, the third light beam C emitted by the light transmitter 40 is reflected by the object 200, and passes through the objective lens group 94 and the lens module 20 in order to reach the light receiver 49. Specifically, the third light beam C passing through the objective lens group 94 enters the first beam 45 from the first surface 41, is sequentially reflected by the fourth surface 44 and the third surface 43, and leaves the first beam from the second surface 42 45, and reach the optical receiver 49. The light receiver 49 receives the third light beam C reflected by the object 200, so that the distance meter can calculate the distance between the object 200 and the distance meter. The rest of the settings and operations are similar to those of the first embodiment, and will not be repeated here.

In the third embodiment, the path of the second light beam B described in FIGS. 4A and 4B is not used, but instead the user directly looks at the display unit 30 to obtain its image information. As for other settings and operations, which are similar to those of the first and second embodiments, they will not be repeated here.

Wherein, the frame module 20 basically includes the first frame 45, including a first surface 41, a second surface 42, a third surface 43, and a fourth surface 44, and the second frame 24 includes a fifth surface 21 , The sixth side 22 and the seventh side 23, wherein the seventh side 23 of the second ridge 24 is adjacent to the third side 43 of the first ridge 45, and the third ridge 34 includes the eighth side 31. The ninth side 32 and the tenth side 33, wherein the eighth side 31 of the third rim 34 faces the sixth side 22 of the second rim 24, and the first film 81 is disposed on the Between the three sides 43 and the seventh side 23, the first light emitted by one of the objects 200 The beam A enters the first beam 45 from the first surface 41, is reflected by the fourth surface 44, and enters the second beam 24 through the third surface 43 and the seventh surface 23 in sequence, and is The surface 21 reflects, leaves the second ridge 24 from the sixth side 22, enters the third ridge 34 from the eighth side 31, is sequentially reflected by the ninth side 32 and the tenth side 33, and passes The eighth side 31 is separated from the third surface 34, wherein the first film 81 allows the first light beam A to pass through and faces the seventh surface 23, which uses the novel structure of the laser module 20 to reduce the volume and Improve the imaging quality. Specifically, the seventh side 23 of the second ridge 24 is adjacent to the third side 43 of the first ridge 45, and the upper half of the eighth side 31 of the third ridge 34 is adjacent to the second edge. The sixth side 22 of the mirror 24. Since the roof ridge and other Han ridges are not used in the structure, the ridge module 20 of the present invention can avoid light leakage better than the existing ridge modules. With such a configuration, it can be ensured that the rangefinder 100 equipped with the lens module 20 has a lower manufacturing cost and a better imaging quality. Moreover, the first light beam A is reflected only four times when it passes through the beam module 20, thereby preventing the brightness of the first light beam A generated by the object 200 from being reduced.

20: 稜鏡 module

21: Fifth side

22: Sixth Side

23: Seventh side

24: The second 稜鏡

30: display unit

31: Eighth side

34: The third scorpion

40: light transmitter

41: First side

42: second side

43: third side

44: Fourth Side

45: The first jerk

49: Optical receiver

50: lens unit

81: The first film

94: Objective lens group

100: Rangefinder

L1: Central axis

Claims (10)

A kind of jerk module, including: A first face includes a first face, a second face, a third face, and a fourth face, wherein the first face, the third face, the second face and the fourth face are adjacent to each other in order, and the The first surface is opposite to the second surface, and the third surface is opposite to the fourth surface; A second ridge includes a fifth side, a sixth side, and a seventh side, wherein the fifth side is adjacent to the sixth side and the seventh side, respectively, and the seventh side of the second ridge The third side adjacent to the first ridge; and A third face, including an eighth face, a ninth face, and a tenth face, wherein the eighth face is adjacent to the ninth face and the tenth face respectively, wherein the eighth face of the third face Facing the sixth side of the second ridge; A first film, arranged between the third side and the seventh side; and Wherein, a first light beam emitted by an object enters the first beam from the first surface, is reflected by the fourth surface, and enters the second beam through the third surface and the seventh surface in sequence, and is The fifth surface reflects, leaves the second ridge from the sixth side, enters the third ridge from the eighth side, is sequentially reflected by the ninth and tenth sides, and passes through the eighth side So as to leave the third beam, wherein the first light beam passes through the first film and faces the seventh surface. According to the patent application item 1 of the ridge module, wherein the first ridge is a diamond-shaped ridge; wherein the first film is formed on the third surface of the first ridge. An optical device including: An objective lens group; It is the same as the 稜鏡 module described in item 1 of the scope of patent application; and One eyepiece group; Wherein, the prism module is arranged between the objective lens group and the eyepiece group, and the first light beam is sequentially passed through Passing through the objective lens group, the lens module and the eyepiece group, and a central axis of the objective lens group and a central axis of the eyepiece group are parallel to each other without overlapping. An optical device including: An objective lens group; A 稜鏡 module, including: A first face, including a first side, a second side, a third side, and a fourth side; A second ridge, including a fifth side, a sixth side, and a seventh side, wherein the seventh side of the second ridge is adjacent to the third side of the first ridge; A third ridge, including an eighth side, a ninth side, and a tenth side, wherein the eighth side of the third ridge faces the sixth side of the second ridge; A first film, arranged between the third side and the seventh side; and Wherein, a first light beam emitted by an object enters the first beam from the first surface, is reflected by the fourth surface, and enters the second beam through the third surface and the seventh surface in sequence, and is The fifth surface reflects, leaves the second ridge from the sixth side, enters the third ridge from the eighth side, is sequentially reflected by the ninth and tenth sides, and passes through the eighth side To leave the third beam, wherein the first light beam passes through the first film and faces the seventh surface; and One eyepiece group; Wherein, the lens module is disposed between the objective lens group and the eyepiece group, the first light beam sequentially passes through the objective lens group, the lens module and the eyepiece group, and a central axis of the objective lens group and the eyepiece group A central axis of the eyepiece group is parallel to each other without overlapping. For example, the optical device described in item 3 or item 4 of the scope of patent application further includes a display unit, which is arranged on one side of the sixth surface of the second beam and used for emitting a second light beam, wherein, The second light beam enters the second beam from the sixth surface, is sequentially reflected by the seventh surface and the fifth surface, passes through the sixth surface again to leave the second beam, and enters from the eighth surface The third edge The mirror is sequentially reflected by the ninth surface and the tenth surface, passes through the eighth surface again to leave the third lens, and passes through the eyepiece group. The optical device according to claim 5, wherein the first film is used for reflecting the second light beam and allowing the first light beam to pass through the first film. For example, the optical device described in item 3 or item 4 of the scope of patent application further includes a light transmitter and a light receiver, wherein the light transmitter is used to emit a third light beam, and the light receiver is used to receive The third light beam reflected by the object to calculate the distance between the object and the optical device, wherein the first film is formed on the third surface of the first beam and is used to reflect the third light beam And make the first light beam pass through the first film. The optical device according to item 7 of the scope of patent application, wherein the light emitter is arranged on one side of the second surface of the first beam, and the third light beam enters the first beam from the second surface, It is sequentially reflected by the third surface and the fourth surface, leaves the first ridge from the first surface, passes through the objective lens group, leaves the optical device to reach the object, is reflected by the object and returns to the object Optical device, and received by the light receiver. For the optical device described in claim 7, wherein the light receiver is arranged on one side of the second surface of the first beam, and the third light beam passes through the objective lens group and leaves the optical device to reach the The object is reflected by the object and then returns to the optical device, passes through the objective lens group again, enters the first beam from the first surface, and is sequentially reflected by the fourth surface and the third surface, and from the second surface The surface leaves the first beam and is received by the light receiver. The optical device described in item 5 of the scope of patent application further includes a light emitter and a light receiver, wherein the light emitter is used for emitting a third light beam, and the light receiver is used for receiving the light reflected by the object The third light beam is used to calculate the distance between the object and the optical device, wherein the first film is used to reflect the second light beam and the third light beam, and make the first light beam pass through the first film.

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