TWI812360B - Optical device and prism module thereof - Google Patents

Abstract

The invention provides an optical device and the prism module thereof. The prism module includes a first prism, a second prism, a film and a light guide unit. The film is disposed between the first prism and the second prism. First visible light enters the first prism, passes through the film, enters the second prism, leaves the second prism, reaches the light guide unit, and is reflected to eyes by the light guide unit. At the same time, second visible light passes through the light guide and reaches the eyes.

Description

Optical device and its optical module (3)

The invention relates to an optical device and its optical module.

Currently, the rangefinder uses a Schmidt-Belgian optics group. However, in order to take into account the configuration of the transmitting/receiving system and the display system, an additional pixel group needs to be added for light splitting, which will increase the overall width of the rangefinder. and height. At the same time, if the Schmidt-Biehan group adopts an off-axis structure, the volume requirement of the group will be relatively large, resulting in increased costs. Therefore, a new architecture needs to be proposed to solve these problems.

In view of this, the purpose of the present invention is to provide an optical device and its optical module, which have a more compact structure. At the same time, due to the reduced volume, the optical path of the display system is shortened and the brightness can be improved.

An optical module according to one embodiment of the present invention includes a first optical element, a second optical element, a film and a light guide unit. The first surface includes a first surface, a second surface and a third surface, the second surface is adjacent to the first surface, and the third surface is adjacent to the second surface and opposite to the first surface. The second side includes a fourth side, a fifth side and a sixth side. The fourth side faces the first side, the sixth side is adjacent to the fourth side, and the fifth side is adjacent to the fourth side. And opposite to the sixth side. The film is disposed between the third surface and the fourth surface. The light guide unit includes a seventh surface and an eighth surface. Wherein, a first visible light enters the first lens through the first surface, is reflected by the second surface, passes through the third surface and the film in sequence, and enters the second lens through the fourth surface, It is reflected by the fifth surface, leaves the second lens through the sixth surface, reaches the light guide unit, and is reflected by the seventh surface of the light guide unit. Wherein, a second visible light enters the light guide unit through the eighth surface, and then leaves the light guide unit through the seventh surface.

In another embodiment, an invisible light enters the first lens through the first surface, is sequentially reflected by the third surface and the second surface, and then leaves the first lens through the first surface, and The traveling direction of the invisible light when entering the first lens and the traveling direction when leaving the first lens are parallel to each other.

In another embodiment, the film passes the first visible light but reflects the invisible light.

In another embodiment, a target object reflects an invisible light to the lens module, enters the first lens through the first surface, is sequentially reflected by the second surface and the third surface, and then passes through the first surface. The first side leaves the first scene.

In another embodiment, the film passes the first visible light but reflects the invisible light.

An optical device according to one embodiment of the present invention includes the aforementioned optical module and a display. The display generates the second visible light. The first visible light reflected by the seventh surface of the light guide unit overlaps with the second visible light leaving the light guide unit through the seventh surface.

In another embodiment, the film module includes a first film, a second film and a film. The first surface includes a first surface, a second surface and a third surface, the second surface is adjacent to the first surface, and the third surface is adjacent to the second surface and opposite to the first surface. The second side panel includes a fourth side facing the third side of the first side panel. The film is disposed between the third surface and the fourth surface. Wherein, an invisible light enters the first lens through the first surface, is sequentially reflected by the third surface and the second surface, and then leaves the first lens through the first surface. The film reflects the invisible light back to the first lens.

In another embodiment, the optical device includes the aforementioned optical module, an optical transmitter and an optical receiver. A light emitter generates the invisible light entering the first lens. The light receiver receives the invisible light that exits the first lens via the first surface and is reflected back to the optical device by a target. Wherein, the traveling direction of the invisible light when entering the first lens and the traveling direction when leaving the first lens are parallel to each other.

In another embodiment, the film module includes a first film, a second film and a film. The first surface includes a first surface, a second surface and a third surface, the second surface is adjacent to the first surface, and the third surface is adjacent to the second surface and opposite to the first surface. The second side panel includes a fourth side facing the third side of the first side panel. The film is disposed between the third surface and the fourth surface. Wherein, a target object reflects an invisible light to the lens module, enters the first lens through the first surface, is sequentially reflected by the second surface and the third surface, and then leaves the first surface through the first surface. The first one. Wherein, the film reflects the invisible light back to the first lens.

In another embodiment, the optical device includes the aforementioned optical module, an optical transmitter and an optical receiver. A light emitter generates the invisible light to the target. A light receiver receives the invisible light exiting the first lens via the first face. Wherein, the traveling direction of the invisible light to the target object and the traveling direction when leaving the first lens are parallel to each other.

1: Binocular telescope rangefinder

10, 10’: 稜鏡module

11, 11’: The first 稜鏡

12, 12’: The second round

13, 13’: Light guide unit

21, 21’: Eyepiece unit

22, 22’: Objective lens unit

24:Light transmitter

25: Optical receiver

26:Display

27: Lens group

28, 28’: Field diaphragm

111, 111’: Side 1

112, 112’: Second side

113, 113’: The third side

114, 114’: Ninth side

121, 121’: The fourth side

122, 122’: The fifth side

123, 123’: The tenth side

124, 124’:Sixth side

131:Seventh side

132: Side 8

L1: first visible light

L2: invisible light

L3: second visible light

Figure 1 shows a photon module and its first visible light path according to one embodiment of the present invention.

Figure 2 shows the 稜鏡 module in Figure 1 and its invisible light path.

Figure 3 shows the 稜鏡 module in Figure 1 and its second visible light path.

Figure 4 is a schematic structural diagram of the invention's 稜鏡 module applied to a binocular telescopic rangefinder.

The camera module of the present invention includes at least a first camera, at least a second camera, At least one film and at least one light guide unit. Please refer to Figure 1 . The optical fiber module 10 according to one embodiment of the present invention includes two first optical modules 11, 11', two second optical modules 12, 12', The two films 31, 31' and the two light guide units 13, 13', the structure of each element is detailed as follows:

The first side 11 includes a first side 111, a second side 112, a third side 113 and a ninth side 114. The first side 111 faces away from the second side 12, and the second side 112 is adjacent to the second side 111. One side 111 and the third side 113, the third side 113 faces the second side 12, the ninth side 114 is adjacent to the first side 111 and the third side 113 at the same time, so the first side 111 is opposite to the third side 113, and the second side 114 faces the second side 113. Side 112 is opposite to ninth side 114 .

The second side 12 includes a fourth side 121, a fifth side 122, a tenth side 123 and a sixth side 124. The fourth side 121 faces the first side 11, and the fifth side 122 is adjacent to the fourth side. Surface 121 and the tenth surface 123, the tenth surface 123 faces away from the first surface 11, the sixth surface 124 is adjacent to the tenth surface 113 and the fourth surface 121 at the same time, so the fourth surface 121 is opposite to the tenth surface 123, and the fifth surface 124 faces the tenth surface 123. Side 122 is opposite to sixth side 124 .

The film 31 is provided between the first housing 11 and the second housing 12 . Specifically, the film 31 is provided between the third surface 113 and the fourth surface 121 . The film 31 can be formed on the third surface 113 first, and then the first housing 11 and the second housing 12 are bonded together. In addition, the thin film 31 allows visible light to pass but reflects invisible light.

The first side 11' is symmetrical in shape with the first side 11, so the first side 11' also includes a first side 111', a second side 112', a third side 113' and a ninth side 114 ', where the first surface 111' faces away from the second surface 12', the second surface 112' is adjacent to the first surface 111' and the third surface 113', and the third surface 113' faces the second surface 12'. The nine faces 114' are adjacent to the first face 111' and the third face 113' at the same time, so the first face 111 faces the third face 113, and the second face 112 faces the ninth face 114.

The second side 12' is symmetrical in shape with the second side 12, so the second side 12' includes It includes a fourth side 121', a fifth side 122', a tenth side 123' and a sixth side 124', in which the fourth side 121' faces the first side 11', and the fifth side 122' is adjacent at the same time. The fourth side 121' and the tenth side 123', the tenth side 123' faces away from the first side 11', the sixth side 124' is adjacent to the tenth side 113' and the fourth side 121', so the fourth side 121 'Opposites the tenth surface 123', and the fifth surface 122' opposes the sixth surface 124'.

Similarly, the film 31' is disposed between the first housing 11' and the second housing 12'. Specifically, the film 31' is sandwiched between the third surface 113' and the fourth surface 121'.

The light guide unit 13 is disposed next to the second housing 12 and includes an opposite seventh surface 131 and an eighth surface 132 . Another light guide unit 13' is disposed next to the second housing 12' and includes an opposite seventh surface 131' and an eighth surface 132'. In this embodiment, the light guide units 13 and 13' are glass flat plates arranged at an angle.

The camera module 10 of the present invention can be used in various optical devices (such as telescopes, etc.) to allow users to observe the surrounding environment. The first visible light (such as ambient light) L1 will enter the first edge through the first surfaces 111, 111'. The mirrors 11, 11' are reflected by the second surfaces 112, 112', pass through the third surfaces 113, 113', the films 31, 31' and the fourth surfaces 121, 121' in sequence, and enter the second mirrors 12, 12 ', is reflected by the fifth surface 125, 125', then passes through the sixth surface 124, 124', leaves the second lens 12, 12', reaches the light guide unit 13, 13', and then passes through the seventh surface 131, 131 'Reflected to the user's eyes. It is worth noting that in some embodiments, the film module 10 may only include a first film 11 (or 11'), a second film 12 (or 12'), and a film 31 (or 31'). ) and a light guide unit 13 (or 13'), which can also receive and guide the first visible light for observation.

The optical module 10 of the present invention can be used with a light transmitter and a light receiver, and can further measure the distance of the target when observing the target. Please refer to the invisible light path shown in Figure 2. The light emitter 24 emits an invisible light (such as ranging light) L2, enters the first lens 11 through the first surface 111, and is reflected on the third surface 113 to the second surface 112. , and then reflected by the second surface 112, Pass through the first surface 111 and leave the first lens 11, reach a target object (not shown), then reflect back from the target object, pass through the first surface 111' and enter another first lens 11', and pass through the first lens 11'. The second surface 112' is reflected to the third surface 113', is reflected again on the third surface 113', leaves the first lens 11' through the first surface 111', and is then received by the light receiver 25. In this way, using the time difference between the emission and reception of invisible light L2, the distance to the target can be calculated (distance = speed of light × time difference ÷ 2). It is worth noting that the traveling direction of the invisible light L2 when entering the first housing 11, 11' and the traveling direction when leaving the first housing 11, 11' are parallel to each other. In addition, through the arrangement of the films 31 and 31', almost all of the invisible light L2 can be reflected back to the first surfaces 11 and 11' when it reaches the third surface 113 and 113'.

The light emitter 24 may be a laser diode (LD) or other light source). The light receiver 25 may be a photoelectric diode (PD), a photomultiplier tube (PMT), a charge coupled device (CCD), or an avalanche photodiode. , APD), or single-photon avalanche diode (SPAD) and other light detectors.

The camera module 10 of the present invention can be used with a display to provide some important information for user reference. As shown in Figure 3, a display 26 emits the second visible light L3 (internal content measurement distance and other information), which passes through the lens assembly. 27 and the light guide unit 13 reach the user's eyes for the user's reference. Specifically, the second visible light L3 sequentially passes through the eighth surface 132 and the seventh surface 131 of the light guide unit 13 and then reaches the user's eyes. It is worth noting that the second visible light L3 leaving the light guide unit 13 through the seventh surface 131 overlaps with the first visible light L1 reflected on the seventh surface 131 of the light guide unit 13 when observing the environment.

The display 26 may be a display device such as an organic light-emitting diode (OLED) or a liquid crystal display (LCD).

Please refer to Figure 4. Figure 4 is a schematic diagram of the structure of the telescope module used in a binocular telescopic rangefinder according to the present invention. As shown in the figure, the binocular telescopic rangefinder 1 includes a light emitting part and A light receiving part, wherein the light emitting part includes an objective lens unit 22, a light emitter 24, a lens module 10, a display 26, a lens group 27, a field stop (Field Stop) 28, and a Eyepiece unit 21. The light receiving part includes an objective lens unit 22', a light receiver 25, a lens module 10', a field diaphragm 28', and an eyepiece unit 21'.

When the user uses the binocular telescopic rangefinder 1 to observe the surrounding environment, the first visible light can pass through the objective lens units 22 and 22', the camera modules 10 and 10', the field diaphragms 28 and 28', and the eyepiece unit 21 , 21' reaches the user's eyes for observation. At the same time, the light emitter 24 emits an invisible light, which reaches the target object (not shown) through the lens module 10 and the objective lens unit 22, and is reflected by the target object back to the binocular telescope. The distance meter 1 then reaches the light receiver 25 through the objective lens unit 22' and the lens module 10', and then uses the time difference between invisible light emission and reception to calculate the distance of the target object. On the other hand, the display 26 can generate a second visible light, reach the user's eyes through the lens group 27, the light guide unit 13, the field diaphragm 28, and the eyepiece unit 21, and provide important information (such as measuring distance, etc.) For user reference.

To sum up, the optical module of the present invention uses at least two optical modules and at least one light guide unit. When applied to an optical device, it can realize a telephoto optical system, a light emitting system/a light receiving system, and a display system. Light splitting makes the overall structure of the optical device more compact. At the same time, due to the reduced volume, the optical path of the display system can be shortened, thereby increasing its brightness.

The above-described embodiments of the present invention are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

1: Binocular telescope rangefinder

10, 10’: 稜鏡module

11, 11’: The first 稜鏡

12, 12’: The second round

13, 13’: Light guide unit

21, 21’: Eyepiece unit

22, 22’: Objective lens unit

24:Light transmitter

25: Optical receiver

26:Display

27: Lens group

28, 28’: Field diaphragm

Claims (10)

A kind of 稜鏡module, including: A first side includes a first side, a second side and a third side, the second side is adjacent to the first side, and the third side is adjacent to the second side and opposite to the first side; A second side includes a fourth side, a fifth side and a sixth side. The fourth side faces the first side, the sixth side is adjacent to the fourth side, and the fifth side is adjacent to the first side. four sides and opposite the sixth side; A thin film located between the third side and the fourth side; A light guide unit includes a seventh surface and an eighth surface; Wherein, a first visible light enters the first lens through the first surface, is reflected by the second surface, passes through the third surface and the film in sequence, enters the second lens through the fourth surface, and is reflected by the second surface. The reflection from the fifth surface leaves the second lens through the sixth surface, reaches the light guide unit, and is then reflected by the seventh surface of the light guide unit; Wherein, a second visible light enters the light guide unit through the eighth surface, and then leaves the light guide unit through the seventh surface. For example, in the lens module described in item 1 of the patent application, an invisible light enters the first lens through the first surface, is sequentially reflected by the third surface and the second surface, and then passes through the first surface. The surface leaves the first lens, and the traveling direction of the invisible light when entering the first lens and the traveling direction when leaving the first lens are parallel to each other. As described in item 2 of the patent application, the film allows the first visible light to pass but reflects the invisible light. For example, in the lens module described in item 1 of the patent application, a target object reflects an invisible light to the lens module, enters the first lens through the first surface, and is sequentially transmitted to the second surface and The third surface reflects and then exits the first lens via the first surface. For example, in the phosphorus module described in item 4 of the patent application, the film allows the first visible light to pass but reflects the invisible light. An optical device including: The same module as described in any one of items 1 to 5 of the patent application scope; a display that generates the second visible light; Wherein, the first visible light reflected by the seventh surface of the light guide unit overlaps with the second visible light leaving the light guide unit through the seventh surface. A kind of 稜鏡module, including: A first side includes a first side, a second side and a third side, the second side is adjacent to the first side, and the third side is adjacent to the second side and opposite to the first side; a second side, including a fourth side facing the third side of the first side; A thin film located between the third side and the fourth side; Wherein, an invisible light enters the first lens through the first surface, is sequentially reflected by the third surface and the second surface, and then leaves the first lens through the first surface; Wherein, the film reflects the invisible light back to the first lens. An optical device including: The same module as described in item 7 of the patent application scope; a light emitter that generates the invisible light entering the first lens; a light receiver that receives the invisible light that exits the first lens via the first surface and is then reflected back to the optical device by a target object; Wherein, the traveling direction of the invisible light when entering the first lens and the traveling direction when leaving the first lens are parallel to each other. A kind of 稜鏡module, including: A first side includes a first side, a second side and a third side, the second side is adjacent to The first side and the third side are adjacent to the second side and opposite to the first side; a second side, including a fourth side facing the third side of the first side; A thin film located between the third side and the fourth side; Wherein, a target object reflects an invisible light to the lens module, enters the first lens through the first surface, is sequentially reflected by the second surface and the third surface, and then leaves the first surface through the first surface. The first 稜鏡; Wherein, the film reflects the invisible light back to the first lens. An optical device including: The same module as described in item 9 of the patent application scope; a light emitter that generates the invisible light to the target object; a light receiver that receives the invisible light leaving the first lens through the first surface; Wherein, the traveling direction of the invisible light to the target object and the traveling direction when leaving the first lens are parallel to each other.

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