A prism test fixture and spectrometer

Abstract

The present invention discloses a prism test fixture and a spectrometer, which relate to the field of prism testing technology, and solve the technical problem that the test equipment in the related technology cannot test the reflectivity and transmittance of the prism. The prism test fixture includes a prism, a carrier and at least two reflectors. There is an angle α between the incident light beam and the outgoing light beam of the prism. The carrier includes a rotatable adjustment part, and the carrier is used to carry the prism. The adjustment part adjusts the angle α. At least two reflectors are arranged on the carrier. The outgoing light beam of the prism is reflected by at least two reflectors in sequence and then emitted in the same direction as the incident light beam of the prism. The present invention can restore the outgoing light beam of the prism on the carrier to a position that is in line with the incident light beam and in the same direction as the incident light beam through at least two reflectors, so that the test equipment that can only test the reflectivity and transmittance of collinear optical path products can also be used for the reflectivity and transmittance test of the prism.

Description

Technical Field

[0001] The present invention relates to the technical field of prism testing, and in particular to a prism testing fixture and a spectrometer. Background Art

[0002] At present, mid-to-high-end camera modules have successively adopted periscope forms, and prisms are essential reflective core components in periscope forms. In order to ensure the imaging quality of camera modules, the reflectivity and transmittance monitoring of prisms has become a necessary monitoring item.

[0003] In the related art, the test equipment generally only supports the reflectivity and transmittance test of products whose incident light beam and outgoing light beam are in a colinear optical path, such as filters. Since there is a certain deflection angle between the incident light beam and the outgoing light beam of the prism, the test equipment in the related art has a single function and cannot test the reflectivity and transmittance of the prism. Summary of the invention

[0004] In view of this, an object of the present invention is to overcome the deficiencies of the prior art. On the first aspect, a prism testing fixture is provided to solve the technical problem that the testing equipment in the related art cannot test the reflectivity and transmittance of the prism.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A prism test fixture, comprising:

[0007] A prism, wherein the prism is provided with at least one reflecting surface, and an incident light beam of the prism is reflected by the reflecting surface to form an outgoing light beam, and an angle α is formed between the incident light beam and the outgoing light beam;

[0008] A carrier, the carrier comprising a rotatable adjusting member, the carrier being used to carry the prism, the adjusting member adjusting the angle α; and

[0009] At least two reflectors, at least two of which are disposed on the carrier;

[0010] The outgoing light beam of the prism is reflected by at least two of the reflectors in sequence, and then is emitted along a line that is colinear with the incident light beam of the prism and in the same direction.

[0011] Based on the above technical solution, the prism test fixture can also be improved as follows.

[0012] Optionally, the carrier includes a carrier, the carrier is provided with at least two slots, and the reflector is inserted into the slots.

[0013] Optionally, the prism is a triangular prism or a polygonal prism. When the prism is an isosceles right-angle triangular prism, the angle α between the incident light beam and the outgoing light beam is 90°, and the number of the reflectors is three.

[0014] Optionally, the reflector includes a first reflector, a second reflector and a third reflector, the mirror surface of the first reflector faces the output light beam of the prism, and the angle between the first reflector and the output light beam of the prism is 45°, the mirror surface of the second reflector faces and is perpendicular to the mirror surface of the first reflector, and the mirror surface of the third reflector faces and is parallel to the mirror surface of the second reflector.

[0015] Optionally, the adjusting member is provided with a bearing surface, and the prism is placed on the carrier and bears against the bearing surface.

[0016] Optionally, the adjustment member is provided with a first rotation hole, the carrier is provided with a second rotation hole, a rotating shaft is inserted between the first rotation hole and the second rotation hole, and the bearing surface and the prism rotate around the rotating shaft.

[0017] Optionally, the adjusting member is further provided with a first positioning hole, and the carrier is further provided with a plurality of second positioning holes, a pin is inserted between the first positioning hole and the second positioning hole, and the adjusting member is positioned by the pin after being rotated.

[0018] Optionally, the carrier includes a bottom plate and a top plate, at least two of the reflectors are respectively connected to the bottom plate and the top plate, the bottom plate is detachably connected to a bracket, the bracket is provided with an inclined supporting surface, and the prism is placed on the inclined supporting surface.

[0019] Optionally, the prism test fixture further includes a shielding plate and a connecting plate, the shielding plate having a shielding hole for forming a light beam, the light beam passes through the shielding hole and irradiates the prism, the connecting plate is connected to the carrier, and the connecting plate has a connecting hole for fixing the prism test fixture.

[0020] In a second aspect, the present invention further provides a spectrometer, comprising the above-mentioned prism testing fixture.

[0021] Compared with the prior art, the prism test fixture provided by the present invention has the following beneficial effects:

[0022] The present invention can restore the outgoing light beam of the prism on the carrier to a position that is collinear with the incident light beam and has the same direction as the incident light beam through at least two reflectors, so that the test equipment that can only test the reflectivity and transmittance of collinear optical path products can also be used for the reflectivity and transmittance test of the prism. At the same time, the rotatable adjustment member can adjust the angle α between the incident light beam and the outgoing light beam of prisms of different shapes, so that the test fixture of the present invention can also be used for the reflectivity and transmittance test of prisms of different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the prism test fixture of the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of the top view of the medium prism test fixture after removing the reflector;

[0026] Figure 3 yes Figure 1 Schematic diagram of the optical path of the medium prism test fixture with three reflectors;

[0027] Figure 4 yes Figure 1 Schematic diagram of the optical path of the medium prism test fixture with two reflectors;

[0028] Figure 5 yes Figure 1 A schematic diagram of the enlarged structure of the adjustment part of the middle prism test fixture;

[0029] Figure 6 is a schematic diagram of the optical path of another embodiment of the prism test fixture of the present invention having three reflectors;

[0030] Figure 7 FIG. 1 is a schematic diagram of a light path of another embodiment of the prism test fixture of the present invention having two reflectors.

[0031] In the figure:

[0032] 10—prism; 20—reflector; 21—first reflector; 22—second reflector; 23—third reflector; 31—carrier; 311—second positioning hole; 32—slot; 33—adjustment member; 331—support surface; 332—first rotating hole; 333—first positioning hole; 41—bottom plate; 42—top plate; 43—bracket; 431—inclined supporting surface; 50—shielding plate; 51—shielding hole; 60—connecting plate; 61—connecting hole. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than comprehensive embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] The present invention provides a prism testing fixture, such as Figures 1 to 3 As shown, it includes a carrier and a reflector 20. The carrier includes but is not limited to a carrier 31. The shape of the carrier 31 is but is not limited to a rectangle, a circle or other shapes. The structure of the carrier 31 is but is not limited to a solid structure, a box-shaped structure or other structures. The prism 10 is placed on the carrier 31. The number of the reflector 20 can be three. Accordingly, three slots 32 are provided on the carrier 31, and the three reflectors 20 are respectively inserted into the three slots 32. Among them, the prism 10 is provided with at least one reflecting surface. The incident light beam of the prism 10 is reflected by the reflecting surface to form an outgoing light beam. There is an angle α between the incident light beam and the outgoing light beam. In this embodiment, the prism 10 is a total reflection prism.

[0036] Specifically, the reflector 20 includes a first reflector 21, a second reflector 22, and a third reflector 23. The mirror surface of the first reflector 21 is set at an angle with the emitted light beam of the prism 10, and the light beam is reflected to the mirror surface of the second reflector 22. The mirror surface of the second reflector 22 is also set at an angle with the light beam reflected by the first reflector 21, so that the light beam is reflected to the mirror surface of the third reflector 23. The mirror surface of the third reflector 23 is set at an angle with the light beam reflected by the second reflector 22, so that the mirror surface of the third reflector 23 emits the light beam out of the prism test fixture, and the emitted light beam is collinear with the incident light beam of the prism 10 and has the same direction. Among them, the mirror angle of each reflector 20 can be arranged according to the law of reflection of light (that is, the reflection angle is equal to the incident angle).

[0037] When the light beam enters the prism 10, it turns inside the prism 10 and is emitted, so that an angle is generated between the incident light beam and the emitted light beam of the prism 10, and the emitted light beam of the prism 10 is emitted after being reflected by three reflectors 20. Along the reflection path of the light beam, the light beam emitted by the last reflector is collinear with the incident light beam of the prism 10 and has the same direction, so that the emitted light beam of the prism 10 is reflected by the three reflectors and restored to a path collinear with the incident light beam of the prism 10 and has the same direction, thereby realizing the function of the test equipment to test the reflectivity and transmittance of the prism 10.

[0038] In this embodiment, the prism 10 can be a triangular prism or a quadrangular prism. Figure 3 As shown, when the isosceles right-angle prism is tested, the angle α between the incident light beam and the outgoing light beam is 90°. The mirror surface of the first reflector 21 is set to face the outgoing light beam of the prism 10, and the angle between the mirror surface of the first reflector 21 and the outgoing light beam of the prism 10 is 45°. The mirror surface of the second reflector 22 is set to face and be perpendicular to the mirror surface of the first reflector 21, and the mirror surface of the third reflector 23 is set to face and be parallel to the mirror surface of the second reflector 22. Then, after the outgoing light beam passing through the prism 10 is reflected by the three reflectors 20, it can be restored to a path that is collinear with the incident light beam of the prism 10 and has the same direction.

[0039] For example, Figure 4 As shown, when the equilateral prism is tested, the angle α between the incident light beam and the outgoing light beam is 120°. The mirror surface of the first reflector 21 is set to face the outgoing light beam of the prism 10, and the mirror surface of the first reflector 21 is parallel to the incident light beam of the prism 10. The mirror surface of the second reflector 22 is set to be 30° with the mirror surface of the first reflector 21. Then, after the outgoing light beam passing through the prism 10 is reflected by the two reflectors 20, it can also be restored to a path that is colinear with the incident light beam of the prism 10 and has the same direction. Of course, depending on the placement angle of the equilateral prism, the angle α between the incident light beam and the outgoing light beam of the prism 10 will also be different. Therefore, the present application does not make any special restrictions on the arrangement position and arrangement angle of the first reflector 21 and the second reflector 22.

[0040] For example, when the prism 10 is a four-sided, five-sided or multi-sided prism, two or more reflecting surfaces may be provided on the prism 10, as long as the prism 10 can reflect all the incident light beams. After the incident light beam of the prism 10 is reflected by the reflecting surface, an outgoing light beam is finally formed which forms an outgoing light beam with an angle α with the incident light beam. When the angle α is 90°, the incident light beam can also be reflected by the reflecting surface. Figure 3 The prism test fixture shown in the figure is used to test the polygonal prism. When the angle α is 120°, the following Figure 4 The prism test fixture shown is used to test a polygonal prism.

[0041] It can be seen that, whether it is a triangular prism or other polygonal prisms, the prism test fixture protected by the present invention can be designed according to the angle of the incident light beam and the emission angle of the prism 10, and the number of reflectors 20 and the placement angle of the reflectors 20, so as to restore the emission light beam of the prism 10 to a path that is colinear with the incident light beam of the prism 10 and has the same direction. Therefore, different embodiments such as the shape of the prism 10, the angle of the incident light beam and the emission angle, the number of reflectors 20, and the placement angle of the reflectors 20 are not repeated here.

[0042] like Figure 5 As shown, in order to facilitate the placement of the prism 10, a rotatable adjustment member 33 is connected to the carrier 31, and the adjustment member 33 is provided with a bearing surface 331 for the prism 10 to bear against. The prism 10 is placed on the carrier 31 and bears against the bearing surface 331. According to the different placement angles of the three reflectors 20, the prism 10 can be slid along the bearing surface 331, and the adjustment member 33 is rotated at the same time, so that the angle of the light beam emitted by the prism 10 can be adjusted. Of course, the shape of the adjustment member 33 includes but is not limited to a semicircular, triangular or rectangular shape. Among them, a first rotating hole 332 is opened on the adjustment member 33, and a second rotating hole (not shown in the figure) is opened on the carrier 31. A rotating shaft is inserted between the first rotating hole 332 and the second rotating hole, and the bearing surface 331 rotates around the rotating shaft.

[0043] It is understandable that a limiting rib may be provided on the carrier 31 so that the adjusting member 33 rotates within the limiting rib. Alternatively, an arc groove may be provided on the carrier 31 so that the adjusting member 33 rotates within the arc groove. All of these embodiments can realize the function of the adjusting member 33 rotating relative to the carrier 31.

[0044] like Figure 5 As shown, the adjusting member 33 is provided with a first positioning hole 333, and the stage 31 is provided with a plurality of second positioning holes 311. When the adjusting member 33 is rotated to the position to be measured, the adjusting member 33 can be positioned by inserting a pin between the first positioning hole 333 and the second positioning hole 311.

[0045] Of course, different structural forms of positioning members can also be provided according to the different structural forms of the adjusting member 33. For example, a plurality of limiting ribs are provided on the carrier 31, and when the adjusting member 33 is installed in different limiting ribs, the function of positioning after the adjusting member 33 is rotated can also be achieved.

[0046] like Figure 3As shown, when testing the isosceles right-angled prism 10, the hypotenuse of the prism 10 is placed against the bearing surface 331 of the adjusting member 33, and the light beam enters and exits from the surfaces of the other two right-angled sides of the prism 10. After being reflected by the three reflectors 20, the outgoing light beam of the prism 10 is restored to a path that is collinear with the incident light beam of the prism 10 and has the same direction.

[0047] When it is necessary to replace the prism 10 with a different shape, for example, when it is necessary to replace it with a prism 10 with an equilateral triangle cross section, take out the isosceles right-angle prism 10 that has been tested. At the same time, the equilateral triangle prism 10 to be tested is supported on the adjustment member 33, the adjustment member 33 is rotated, and the prism 10 is moved along the supporting surface 331, which can also restore the reflected light beam to a path that is colinear with the incident light beam of the prism 10 and has the same direction. The prism test fixture provided by the present invention can be applied to the reflectivity and transmittance testing of prisms 10 of various shapes.

[0048] It is understandable that, since the light beam is refracted when entering or exiting the prism 10, it is necessary to pre-adjust the placement angle and placement position of the prism 10 before testing prisms 10 of different shapes. The adjusting member 33 is designed to be a rotatable structure, so that after the adjusting member 33 is adjusted to the placement angle, the prism 10 can be supported on the supporting surface 331 of the adjusting member 33. At the same time, the prism 10 can move along the supporting surface 331 to adjust the placement position of the prism 10, so that the angle α of the emitted light beam of the prism 10 is adjustable, so as to ensure that the light beam emitted through the last reflector 20 is collinear and in the same direction as the incident light beam of the prism 10. According to the principle that the light intensity of the emitted light beam is attenuated relative to the incident light beam, the light intensity of the incident light beam of the prism 10 and the light intensity of the emitted light beam can be detected and compared by a spectrometer, so as to test the reflectivity and transmittance of the prism 10.

[0049] Of course, for the prism 10 made of high-transmittance and high-reflectivity glass materials such as heavy flint glass (h-zf3), due to the high refractive index of the glass, the refracted light will disappear and all the incident light will be reflected. In actual testing, the influence of the light beam refractive index can also be ignored. Therefore, the adjustment member 33 and the reflector 20 can also be set to a relatively fixed structure, so that there is no need to adjust the output light beam angle α of the prism 10. Figure 3 As shown, the angle between the mirror surface of the reflector 20 and the incident light beam of the prism 10 is 45°, which can make the mirror surfaces of two adjacent reflectors 20 along the reflection path of the light beam parallel or perpendicular to each other, thereby making the structural arrangement of the reflector 20 on the carrier 31 more regular.

[0050] like Figure 4As shown, the prism test fixture provided by the present invention can also realize the function of restoring the light beam reflection path through two reflectors 20, that is, the arrangement of the first reflector 21 and the second reflector 22 shown in the figure. However, the light beam reflection path formed by the two reflectors 20 is irregular, which is not conducive to the adjustment of the reflection angle of the reflector 20 when replacing the prism 10 of different shapes. Therefore, it is better to use three reflectors 20 to change the path of the light beam emitted by the prism 10. Of course, the number of reflectors 20 set on the carrier 31 can also be four or more. In addition to being designed as a rotatable structure, the adjustment member 33 and the reflector 20 can also be designed as a structure that can slide on the carrier 31.

[0051] like Figures 1 to 4 As shown, the prism test fixture further includes a shielding plate 50 and a connecting plate 60. The shielding plate 50 is provided with a shielding hole 51 for forming a light beam, and the light beam passes through the shielding hole 51 and irradiates the prism 10. A receiver is provided at a position opposite to the shielding hole 51, and the light beam reflected by the reflector 20 finally enters the receiver, thereby testing the reflectivity and transmittance of the prism 10.

[0052] The connecting plate 60 is connected to the bottom of the carrier 31 . The connecting plate 60 is provided with connecting holes 61 for fixing the prism test fixture, so that the prism test fixture can be fixed to the position to be tested by connecting members such as bolts or screws.

[0053] Embodiment 2:

[0054] In the above embodiment, the prism test fixture is designed as a horizontal structure of the carrier 31. Based on the same inventive concept, as another implementation, this embodiment also provides a prism test fixture with a vertical structure. Figure 6 As shown, the carrier includes a bottom plate 41 and a top plate 42, which are connected to form a box-shaped structure with an internal cavity. Of course, the shielding plate 50 is connected to one end of the box-shaped structure, and the connecting plate 60 is connected to the bottom of the bottom plate 41.

[0055] like Figure 6 As shown, the prism 10 and the reflector 20 are both installed in the inner cavity of the box-shaped structure. Specifically, the prism 10 and the third reflector 23 are connected to the bottom plate 41, and the first reflector 21 and the second reflector 22 are connected to the top plate 42. When the light beam enters the prism 10, the light beam turns at the prism 10 and is reflected by the three reflectors 20, and can also remain collinear with the incident light beam of the prism 10 and be emitted in the same direction, thereby realizing the function of the test equipment to test the reflectivity and transmittance of the prism 10.

[0056] The bottom plate 41 is provided with a mounting hole (not shown in the figure), in which a bracket 43 is detachably connected, and the bracket 43 is provided with an inclined support surface 431, on which the prism 10 is placed. In order to prevent the prism 10 from slipping off, a retaining edge can be provided on the bracket 43.

[0057] It is understandable that the height of the bracket 43 and the tilt angle of the inclined support surface 431 can be designed accordingly according to the different shapes of the prism 10. When replacing the prism 10 of different shapes, it is only necessary to replace the bracket 43 of different heights and the inclined support surface 431 of different tilt angles to achieve the function of testing the reflectivity and transmittance of the prism 10 of different shapes.

[0058] like Figure 7 As shown, the principle of the prism test fixture is the same as that of the horizontal structure. Only two reflectors 20 can be set in the internal cavity of the box-type structure, that is, the arrangement of the first reflector 21 and the second reflector 22 shown in the figure. The light beam turns at the prism 10 and is reflected by the two reflectors 20. It can also remain collinear with the incident light beam of the prism 10 and be emitted in the same direction, thereby realizing the function of the test equipment to test the reflectivity and transmittance of the prism 10.

[0059] Embodiment 3:

[0060] The present invention also provides a spectrometer, including the prism test fixture in the above embodiment. If the spectrometer is already provided with a shielding plate 50, the prism test fixture may not need to be provided with the shielding plate 50. According to the specific model of the spectrometer, a prism test fixture with a horizontal structure or a vertical structure in the above embodiment can be selected, and the prism test fixture can be installed at the shielding plate 50 position of the spectrometer through the connecting hole 61 on the connecting plate 60. Thereby, the spectrometer that originally only supports the reflectivity and transmittance test of collinear optical path products is expanded to a spectrometer that can also test the reflectivity and transmittance of prisms. When it is necessary to test the reflectivity and transmittance of collinear optical path products such as filters, it is only necessary to remove the prism test fixture.

[0061] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prism test fixture, characterized in that: include: A prism (10), the prism (10) being provided with at least one reflecting surface, an incident light beam of the prism (10) being reflected by the reflecting surface to form an outgoing light beam, an angle α being formed between the incident light beam and the outgoing light beam; A carrier, the carrier comprising a rotatable adjustment member (33), the carrier being used to carry the prism (10), the adjustment member (33) adjusting the angle α; and At least two reflectors (20), at least two of the reflectors (20) being arranged on the carrier; Wherein, the light beam emitted from the prism (10) is reflected by at least two of the reflectors (20) in sequence, and then emitted along a line that is colinear with and in the same direction as the light beam incident on the prism (10); The carrier comprises a carrier platform (31), the carrier platform (31) being provided with at least two slots (32), the reflector (20) being inserted into the slots (32); The adjusting member (33) is provided with a bearing surface (331), and the prism (10) is placed on the carrier (31) and bears against the bearing surface (331); The adjusting member (33) is provided with a first rotating hole (332), the carrier (31) is provided with a second rotating hole, a rotating shaft is inserted between the first rotating hole (332) and the second rotating hole, and the bearing surface (331) and the prism (10) rotate around the rotating shaft; The adjusting member (33) is further provided with a first positioning hole (333), and the carrier (31) is further provided with a plurality of second positioning holes (311). A pin is inserted between the first positioning hole (333) and the second positioning hole (311), and the adjusting member (33) is positioned by the pin after rotation.

2. The prism test fixture according to claim 1, characterized in that: The prism (10) is a triangular prism or a polygonal prism. When the prism (10) is an isosceles right-angle triangular prism, the angle α between the incident light beam and the outgoing light beam is 90°, and the number of the reflectors (20) is three.

3. The prism test fixture according to claim 2, characterized in that: The reflector (20) comprises a first reflector (21), a second reflector (22) and a third reflector (23); the mirror surface of the first reflector (21) faces the light beam emitted from the prism (10), and the included angle between the first reflector (21) and the light beam emitted from the prism (10) is 45°; the mirror surface of the second reflector (22) faces and is perpendicular to the mirror surface of the first reflector (21); and the mirror surface of the third reflector (23) faces and is parallel to the mirror surface of the second reflector (22).

4. The prism test fixture according to claim 1, characterized in that: The carrier comprises a bottom plate (41) and a top plate (42), at least two of the reflectors (20) are respectively connected to the bottom plate (41) and the top plate (42), the bottom plate (41) is detachably connected to a bracket (43), the bracket (43) is provided with an inclined supporting surface (431), and the prism (10) is placed on the inclined supporting surface (431).

5. The prism test fixture according to any one of claims 1 to 4, characterized in that: The prism test fixture further comprises a shielding plate (50) and a connecting plate (60); the shielding plate (50) is provided with a shielding hole (51) for forming a light beam; the light beam passes through the shielding hole (51) and irradiates the prism (10); the connecting plate (60) is connected to the carrier; the connecting plate (60) is provided with a connecting hole (61) for fixing the prism test fixture.

6. A spectrometer, characterized in that: A prism test fixture comprising any one of claims 1 to 5.

Images