Sighting device and beam splitter module thereof

Abstract

The invention relates to aiming equipment and a beam splitter module thereof. The aiming device comprises a light source module and a beam splitter module. The light source module is configured to project a first light and a second light. The first light and the second light have different wavelengths. The beam splitter module comprises at least two lenses which are used for reflecting the first light and the second light and reducing the chromatic aberration between the first light and the second light.

Description

Technical Field

[0001] The present invention relates to a sighting device and a light analyzer module thereof, in particular to a sighting device with light sources of different wavelengths and a light analyzer module thereof. Background Art

[0002] The lens module of the conventional aiming device is currently designed for a single wavelength light source. However, when the light emitting element of the aiming device needs to emit different light, since the different light has different wavelengths, chromatic aberration will occur when passing through the lens module, further causing parallax when the user views from different positions, resulting in reduced accuracy. Therefore, a aiming device and a light analyzer module are needed to improve the parallax that may be caused by multiple light sources. Summary of the invention

[0003] In view of this, one of the objectives of the present disclosure is to provide a sighting device and a light analyzer module to solve the above-mentioned problem.

[0004] According to an embodiment of the present disclosure, a sighting device is disclosed, comprising: a light source module and a light analyzer module. The light source module projects a first light and a second light. The first light and the second light have different wavelengths. The light analyzer module comprises at least two lenses for reflecting the first light and the second light and reducing the chromatic aberration between the first light and the second light.

[0005] According to one embodiment of the disclosure, a light analyzer module for a sighting device is disclosed, comprising: a first lens, a second lens, and a third lens. The second lens is disposed between the first lens and the third lens. The third lens faces a light source module of the sighting device. The second lens has a reflective film on a side adjacent to the first lens. The reflective film is used to reflect the first light and the second light projected by the light source module.

[0006] According to one embodiment of the present disclosure, a light analyzer module for a sighting device is disclosed, comprising: a first lens and a second lens. The second lens faces a light source module of the sighting device. The second lens has a first reflective film and a second reflective film on a first surface and a second surface, respectively. The first reflective film is used to reflect a first light projected by the light source module. The second reflective film is used to reflect a second light projected by the light source module. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The various aspects of the present disclosure can be best understood when reading the following detailed description and the accompanying drawings. It should be noted that the various features in the drawings are not drawn to scale, in accordance with standard operating practices in the art. In fact, the size of certain features may be deliberately enlarged or reduced in order to be clearly described.

[0008] Figure 1 is a schematic diagram of a sighting device 1 according to an embodiment of the present disclosure;

[0009] Figure 2 is a schematic diagram of a sighting device 2 according to an embodiment of the present disclosure; and

[0010] Figure 3 FIG. 4 is a schematic diagram of a sighting device 3 according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0011] The following disclosure provides many different embodiments or examples for implementing different features of the present application. The description of specific examples of components and configurations is as follows to simplify the disclosure of the present application. Of course, these are only examples and are not intended to limit the present application. For example, the following description of forming a first feature on or above a second feature may include an embodiment in which a first and second feature are formed in direct contact, and may also include an embodiment in which other features are formed between the first and second features, so that the first and second features are not in direct contact. In addition, the present application may repeat component symbols and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, rather than governing the relationship between different embodiments and / or the architectures discussed.

[0012] Furthermore, this application may use spatially corresponding terms, such as "below," "below," "lower," "above," "higher," and similar terms, to describe the relationship of one element or feature to another element or feature in the drawings. Spatially corresponding terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. The device may be positioned (rotated 90 degrees or at other orientations) and the spatially corresponding descriptors used in this application interpreted accordingly.

[0013] Although the numerical ranges and parameters disclosed in the broad scope of the present disclosure are approximate values, the numerical values ​​described in the specific embodiments are as accurate as possible. However, any numerical value inherently contains certain errors caused by the standard deviation obtained in the individual test measurements. Furthermore, as described herein, "about" generally refers to within 10%, 5%, 1%, or 0.5% of a given value or range. Alternatively, the term "about" refers to within the acceptable standard error of the average value considered by the ordinary technician in the art. Except in the operation / working examples, or unless otherwise specified, all numerical ranges, amounts, values ​​and ratios disclosed herein, such as the amount of material, time period, temperature, operating conditions, ratio of amounts, and the like, should be understood to be modified by the term "about" in all cases. Therefore, unless otherwise stated, the numerical parameters described in the present disclosure and the scope of the patent application are all approximate values ​​that can be varied as needed. Each numerical parameter should be interpreted at least according to the number of significant figures reported and using ordinary rounding techniques. In this article, the range can be expressed as from one endpoint to another, or between two endpoints. Unless otherwise stated, all ranges disclosed herein are inclusive of the endpoints.

[0014] Figure 1 1 is a schematic diagram of a sighting device 1 according to an embodiment of the present disclosure, wherein the sighting device 1 comprises a light source module 11, a light diffusing lens module 13, a housing 15, and a protective lens 17. The light source module 11 and the light diffusing lens module 13 are disposed in the housing 15, and the light diffusing lens module 13 comprises at least two lenses. The protective lenses 17 are disposed at opposite ends of the housing 15 to protect the light source module 11 and the light diffusing lens module 13.

[0015] In some embodiments, the light source module 11 is used to project the first light 110 (shown by the dotted line) and the second light 112 (shown by the solid line) with different wavelengths from the position of the light source module 11 to the dichroic mirror module 13. In other words, the light source module 11 is used to project the first light 110 and the second light 112 with different visible colors from the position of the light source module 11 to the dichroic mirror module 13. Then, the first light 110 and the second light 112 are reflected by the dichroic mirror module 13, so that the user can observe the first light 110 and the second light 112 reflected by the dichroic mirror module 13.

[0016] In more detail, when light of different wavelengths is projected at the same position and reflected by a general reflective lens, due to the factor of chromatic aberration, when the user views the reflected light at different positions or angles, parallax will occur, thereby causing the accuracy of aiming to decrease. Therefore, in order to prevent the user from the aforementioned situation when using the aiming device 1 with light of different wavelengths, the light analyzer module 13 of the present disclosure uses a designed lens structure to reduce or even eliminate the chromatic aberration between the first light 110 and the second light 112 when reflecting the first light 110 and the second light 112. The following embodiments will further illustrate how the light analyzer module of the present disclosure reduces or eliminates the chromatic aberration caused by the reflection of different light at the same light emitting position through structural design.

[0017] The first light 110 (shown by dotted lines) and the second light 112 with different wavelengths emitted by the light source module 11 of an embodiment of the present disclosure can project different crosshair patterns on the light analyzer module 13. The user can select crosshair patterns of different colors for different application scenarios (such as seasons). For example, when the application scenario is summer and the color of the woods is green, the user can select a red crosshair pattern to clearly identify the target object in the woods. For example, when the application scenario is autumn and the color of the woods is orange-red, the user can select a green crosshair pattern to clearly identify the target object in the woods. For example, in other scenarios, the user can choose to display red and green crosshair patterns at the same time.

[0018] Figure 2Schematic diagram of a sighting device 2 according to an embodiment of the present disclosure, the sighting device 2 comprises a light source module 21, a light analyzer module 23, a housing 25 and a protective lens 27. The light source module 21 and the light analyzer module 23 are disposed in the housing 25. The protective lens 27 is disposed at opposite ends of the housing 25 to protect the light source module 21 and the light analyzer module 23. In some embodiments, the protective lens 27 is a generally transparent lens without a focusing function.

[0019] In some embodiments, the light analyzer module 23 includes a first lens 231, a second lens 233, and a third lens 235. Specifically, the first lens 231, the second lens 233, and the third lens 235 are adjacently arranged by bonding (e.g., gluing), and the second lens 233 is arranged between the first lens 231 and the third lens 235. In the aiming device 2, the third lens 235 of the light analyzer module 23 faces the light source module 21. In other words, the third lens 235 of the light analyzer module 23 is the shortest distance from the light source module 21. The second lens 233 has a reflective film 23A on a surface adjacent to the first lens 231. In some embodiments, the reflective film 23A is transparent and can reflect the first light 210 and the second light 212.

[0020] In some embodiments, the light source module 21 is used to project the first light 210 (shown by the dotted line) and the second light 212 (shown by the solid line) with different wavelengths from the position of the light source module 21 to the dichroic mirror module 23, and the first light 210 and the second light 212 are reflected by the reflection mode 233A of the dichroic mirror module 23, so that the user can observe the first light 210 and the second light 212 reflected by the dichroic mirror module 23. For example, the light source module 21 is used to project the green light 210 and the red light 212 from the position of the light source module 21 to the dichroic mirror module 23, and the green light 210 and the red light 212 are reflected by the reflection mode 233A of the dichroic mirror module 23, so that the user can observe the green light 210 and the red light 212 reflected by the dichroic mirror module 23.

[0021] In some embodiments, in order to reduce or even eliminate the chromatic aberration between the first light 210 and the second light 212 when reflecting the first light 210 and the second light 212, the aiming device 2 of the present disclosure has the following structural features: (1) the second lens 233 is a positive lens and the third lens 235 is a negative lens; (2) the refractive index of the second lens 233 is lower than the refractive index of the third lens 235 and the Abbe number of the second lens 233 is higher than the Abbe number of the third lens 235 (for example, the material of the second lens 233 includes crown glass and the material of the third lens 235 includes flint glass); (3) in the structural parameters of the second lens 233, the focus must be aligned with the light source module 21 (i.e., the light source module 21 is located at the focus of the second lens 233); (4) in the structural parameters of the third lens 235, the focus must be aligned with the light source module 21 (i.e., the light source module 21 is located at the focus of the third lens 235); and (5) the light source module 21 is located on the main optical axis A21 of the light analyzer module 23. As a result, the first light 210 and the second light 212 can be emitted in parallel after being reflected by the light splitting mirror module 23 , and the chromatic aberration between the first light 210 and the second light 212 can be greatly reduced or even eliminated.

[0022] In some embodiments, the aforementioned point (2) can also be adjusted as required so that the refractive index of the second lens 233 is higher than that of the third lens 235 and the Abbe number of the second lens 233 is lower than that of the third lens 235, thereby achieving the same function.

[0023] In some embodiments, the first lens 231 is used to adjust the overall thickness of the diffraction lens module 2 so that the diffraction lens module 2 has a consistent thickness. In this way, when a user views a target object (not shown) through the diffraction lens module 2 , the target object will not be magnified or reduced due to the diffraction lens module 2 .

[0024] Figure 3 Schematic diagram of a sighting device 3 according to an embodiment of the present disclosure, the sighting device 3 comprises a light source module 31, a light diffusing lens module 33, a housing 35 and a protective lens 37. The light source module 31 and the light diffusing lens module 33 are disposed in the housing 35. The protective lens 37 is disposed at opposite ends of the housing 35 to protect the light source module 31 and the light diffusing lens module 33. In some embodiments, the protective lens 37 is a general transparent lens.

[0025] In some embodiments, the light analyzer module 33 includes a first lens 331 and a second lens 333. Specifically, the first lens 331 and the second lens 333 are disposed adjacent to each other by bonding (e.g., gluing). In the aiming device 3, the second lens 333 of the light analyzer module 33 faces the light source module 31. In other words, the second lens 333 of the light analyzer module 33 is at the shortest distance from the light source module 31. The second lens 333 has a first surface 333a and a second surface 333b. The first surface 333a has a reflective film 33A, and the second surface 333b has a reflective film 33B. The reflective film 33A and the reflective film 33B are used to reflect light of different wavelengths, respectively.

[0026] In some embodiments, the light source module 31 is used to project a first light 310 (shown by a dotted line) and a second light 312 (shown by a solid line) having different wavelengths from the position of the light source module 31 to the light analyzer module 33. Then, the first light 310 is reflected by the reflective film 33A of the light analyzer module 33, and the second light 312 is reflected by the reflective film 33B of the light analyzer module 33, so that the user can observe the first light 310 and the second light 312 reflected by the light analyzer module 33.

[0027] In some embodiments, in order to reduce or even eliminate the chromatic aberration between the first light 310 and the second light 312 when reflecting the first light 310 and the second light 312, the aiming device 3 disclosed herein has the following structural features: (1) the second lens 333 is a negative lens; (2) the second surface 333b is a curved surface and the light source module 31 is located between the arc center 333C of the second surface 333b and the second surface 333b (i.e., the light source module 31 is located at half the distance between the arc center 333C of the second surface 333b and the second surface 333b); and (3) the light source module 31 is located on the main optical axis A31 of the light separation mirror module 33. In this way, the first light 310 and the second light 312 can be emitted in parallel after being reflected by the light separation mirror module 33, and the chromatic aberration between the first light 310 and the second light 312 can be greatly reduced or even eliminated.

[0028] In some embodiments, the first lens 331 is used to adjust the overall thickness of the diffraction lens module 3 so that the diffraction lens module 3 has a consistent thickness. In this way, when a user views a target object (not shown) through the diffraction lens module 3 , the target object will not be magnified or reduced due to the diffraction lens module 3 .

[0029] In some embodiments, adjusting the structural parameters of the light-dividing mirror module 33 can correct the chromatic aberration elimination range between the first light 310 and the second light 312. Specifically, the structural parameters of the second lens 333 of the light-dividing mirror module 33 are: (1) the curvature radius of the second surface 333b is r 1 ; (2) The radius of curvature of the first surface 333a is r 2; (3) The refractive index of the material of the second lens 333 is n; (4) The optical power of the second lens 333 is The structural parameters have the following relationship:

[0030]

[0031] When the horizontal distance d from the light source module 31 to the second lens 333 is fixed, the curvature radius r of the second surface 333 b of the second lens 333 is 1 It is determined by the horizontal distance d from the light source module 31 to the second lens 333, that is, r 1 =2×d.

[0032] At the same time, the back intercept l of the second lens 333 for the wavelength of the light reflected by the first surface 333a is ′ F = d, and then the intercept In addition, according to the Schott Formula related to optics, the formula of the refractive index n of glass material and wavelength is: n 2 =a 0 +a 1 λ 2 +a 2 λ -2 +a 3 λ -4 +a 4 λ -6 +a 5 λ -8 . Among them a 0 ,a 1 ,a 2 ,a 3 ,a 4 ,a 5 is a constant coefficient determined by the glass material. λ is the wavelength.

[0033] It can be understood from the above formula and structural parameters that given the reflection wavelength, material and light source working distance of the first surface 333a and the second surface 333b (i.e., the horizontal distance d from the light source module 31 to the second lens 333), r can be calculated. 1 、r 2 The initial value of the first surface 333a is 300 nm, and in general, the larger the wavelength, the smaller the refractive index. When other conditions remain unchanged, the longer the wavelength of the light reflected by the first surface 333a, the greater the curvature radius r. 2 The smaller.

[0034] According to the present disclosure, the light analyzer module of the aiming device can simultaneously reflect light of different wavelengths and reduce or even eliminate the chromatic aberration caused by the reflected light of different wavelengths to avoid parallax that may occur when the user views from different positions, thereby greatly improving the accuracy.

[0035] Although the disclosure and its advantages are described above, it is understood by those skilled in the art that various changes, substitutions and replacements may be made to the disclosure without departing from the concept and scope defined by the appended claims of the disclosure. For example, the above-mentioned processes may be implemented in different ways and may be replaced by any other processes or combinations thereof.

[0036] The scope of the present disclosure is not limited to any specific embodiment of any process, machine, manufacture, composition of matter, device, method, and step described herein. The present disclosure described herein enables a person skilled in the art to implement the present disclosure using any existing or potential process, machine, manufacture, composition of matter, device, method, or step that has the same function as that disclosed in the foregoing specific embodiment or can achieve substantially the same result. Therefore, such processes, machines, manufactures, compositions of matter, devices, methods, and steps all fall within the claims attached to the present disclosure.

[0037]

Explanation of symbols

[0038] 1 Aiming device

[0039] 11 Light source module

[0040] 110 First Light

[0041] 112 Second Ray

[0042] 13. Light analyzer module

[0043] 15. Housing

[0044] 17 Protective lens

[0045] 2 Aiming device

[0046] 21 Light source module

[0047] 210 First Light

[0048] 212 Second Ray

[0049] 23. Light analyzer module

[0050] 23A Reflective film

[0051] 231 First lens

[0052] 233 Second lens

[0053] 235 Third lens

[0054] 25 Shell

[0055] 27 Protective lens

[0056] 3 Aiming device

[0057] 31 Light source module

[0058] 310 First Light

[0059] 312 Second Ray

[0060] 33. Light analyzer module

[0061] 33A Reflective film

[0062] 33B Reflective film

[0063] 331 First lens

[0064] 333 Second lens

[0065] 333a Page 1

[0066] 333b Side 2

[0067] 35 Shell

[0068] 37 Protective lens

[0069] A21 Main optical axis

[0070] A31 Main optical axis

Claims

1. A sighting device, comprising: A light source module configured to project a first light and a second light, wherein the first light and the second light have different wavelengths; as well as The light analyzer module includes at least two lenses for reflecting the first light and the second light and reducing the chromatic aberration between the first light and the second light.

2. The aiming device according to claim 1, wherein the at least two lenses include a first lens, a second lens and a third lens, the second lens is arranged between the first lens and the third lens, the third lens faces the light source module, and the second lens has a reflective film on a side adjacent to the first lens, and the reflective film is used to reflect the first light and the second light.

3. The aiming device according to claim 2, wherein the light-dividing mirror film block has a uniform thickness. The sighting device according to claim 2 , wherein the second lens is a positive lens and the third lens is a negative lens.

5. The sighting device according to claim 4, wherein when the refractive index of the second lens is lower than the refractive index of the third lens, the Abbe number of the second lens is higher than the refractive index of the third lens, and when the refractive index of the second lens is higher than the refractive index of the third lens, the Abbe number of the second lens is lower than the refractive index of the third lens. The aiming device according to claim 5 , wherein the light source module is disposed at a focal point of the second lens and the third lens. 7 . The aiming device according to claim 1 , wherein the light source module is disposed on a main optical axis of the light analyzing mirror module.

8. The aiming device according to claim 1, wherein the at least two lenses include a first lens and a second lens, the second lens faces the light source module, and the second lens has a first reflective film and a second reflective film on a first surface and a second surface respectively, the first reflective film is used to reflect the first light, and the second reflective film is used to reflect the second light.

9. The aiming device according to claim 8, wherein the light diffraction mirror film block has a uniform thickness.

10. The sighting device according to claim 8, wherein the second lens is a negative lens. 11 . The aiming device according to claim 10 , wherein the second surface of the second lens faces the light source module, the second surface is a curved surface, and the light source module is located between the arc center of the second surface and the middle of the second surface.

12. A light analyzer module for a sighting device, comprising: First lens; Second lens; and The third lens; The second lens is disposed between the first lens and the third lens, the third lens faces the light source module of the aiming device, and the second lens has a reflective film on a side adjacent to the first lens, and the reflective film is used to reflect the first light and the second light projected by the light source module. 13 . The light-dividing mirror module according to claim 12 , wherein the light-dividing mirror film block has a uniform thickness. 14 . The light-dividing mirror module according to claim 12 , wherein the second lens is a positive lens, and the third lens is a negative lens.

15. The light analyzer module according to claim 14, wherein when the refractive index of the second lens is lower than the refractive index of the third lens, the Abbe number of the second lens is higher than the refractive index of the third lens, and when the refractive index of the second lens is higher than the refractive index of the third lens, the Abbe number of the second lens is lower than the refractive index of the third lens.

16. A light analyzer module for a sighting device, comprising: First lens; and Second lens; The second lens faces the light source module of the aiming device, and has a first reflective film and a second reflective film on the first surface and the second surface respectively. The first reflective film is used to reflect the first light projected by the light source module, and the second reflective film is used to reflect the second light projected by the light source module. 17 . The light diffusing mirror module according to claim 16 , wherein the light diffusing mirror film block has a uniform thickness. The light-dividing mirror module according to claim 16 , wherein the second lens is a negative lens.

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