Light emitting module and optical device thereof

Abstract

The invention discloses a light-emitting module and an optical device thereof. The light-emitting module comprises a light-emitting unit, a columnar optical assembly, a supporting unit and a base. The supporting units are connected with the base, and part of the supporting units are higher than the connecting positions of the base and the supporting units. The light-emitting unit is arranged on the base and comprises a light-emitting surface which can emit a light beam. The columnar optical assembly comprises an incidence face, the two ends of the columnar optical assembly are connected with the supporting unit respectively, the incidence face faces the light-emitting face, a distance is formed between the incidence face and the light-emitting face, and light beams emitted by the light-emitting face enter the columnar optical assembly through the incidence face. The light-emitting module satisfies the following conditions: 2 < = D / E < = 6; wherein D is the diameter of the columnar optical assembly, and E is the distance between the light-emitting unit and the incident plane.

Description

Technical Field

[0001] The invention relates to a light emitting module and an optical device thereof. Background Art

[0002] The laser beam emitted by a traditional laser diode has a larger beam divergence angle in the fast axis direction than in the slow axis direction, making the laser beam spot elliptical. The large beam divergence angle in the fast axis direction leads to poor collimation of the beam, and the energy of the beam in the fast axis direction is more easily lost, which is not conducive to the subsequent application of laser diodes. Therefore, when using an optical device with emission and reception developed by a traditional laser diode, its scanning precision is poor and the scanning range is small, which can no longer meet today's needs. Summary of the invention

[0003] In view of this, the main object of the present invention is to provide a light emitting module which can improve the collimation of a light beam.

[0004] The light-emitting module of the present invention includes a light-emitting unit, a columnar optical component, a support unit and a base. The support unit is connected to the base, and a part of the support unit is higher than the connection between the base and the support unit. The light-emitting unit is arranged on the base, and the light-emitting unit includes a light-emitting surface, and the light-emitting surface can emit a light beam. The columnar optical component includes an incident surface, and the two ends of the columnar optical component are respectively connected to the support unit, and the incident surface is facing the light-emitting surface and a distance is included between the incident surface and the light-emitting surface, and the light beam emitted by the light-emitting surface enters the columnar optical component from the incident surface. The light-emitting module satisfies the following conditions: 2≤D / E≤6; wherein D is the diameter of the columnar optical component, and E is the distance between the light-emitting unit and the incident surface.

[0005] The light emitting unit is a laser diode, and the columnar optical component is a columnar lens, a cylindrical lens, an optical fiber or a fast axis collimating lens.

[0006] The optical device of the present invention comprises a transmitting module and a receiving module. The transmitting module comprises a light emitting module and a collimating lens. The receiving module comprises a receiving lens and a light receiver. The light beam emitted by the light emitting module first enters and penetrates the collimating lens, then enters an object to be tested and is reflected by the object to be tested, then enters and penetrates the receiving lens, and finally enters the light receiver.

[0007] Another optical device of the present invention includes a transmitting module and a receiving module. The transmitting module includes a first light-emitting module array and a collimating lens, the first light-emitting module array includes a plurality of light-emitting modules, and these light-emitting modules are arranged along the slow axis direction of the light-emitting modules. These light-emitting surfaces each include a center point. The receiving module includes a receiving lens and a first light receiver array, and the first light receiver array includes a plurality of light receivers. The light beams emitted by the first light-emitting module array are respectively incident on and penetrate the collimating lens, then incident on an object to be tested and reflected by the object to be tested, then incident on and penetrate the receiving lens, and finally incident on these light receivers of the first light receiver array. The optical device satisfies at least one of the following conditions: Y≤31mm; 0.90≤Y / (2×fts×tan(ω))≤1.10; 0.90≤Y / ((n-1)×L+d)≤1.10; 0.90≤H / (2×fr×tan(ω))≤1.10; wherein, Y is the distance from the first light-emitting surface to the last light-emitting surface in the first light-emitting module array along the slow axis direction; n is the total number of these light-emitting modules; L is the distance between the two center points of the two light-emitting surfaces of two adjacent light-emitting modules in the first light-emitting module array; d is the slow axis length of the light-emitting surface; fts is the effective focal length of the light-emitting module in the transmitting module in the slow axis direction; ω is the half field of view of the transmitting module; H is the distance from the center point of the first light receiver to the center point of the last light receiver in the first light receiver array; fr is the effective focal length of the receiving module.

[0008] The optical device satisfies at least one of the following conditions: 0.90≤L / (2×fts×tan(β))≤1.10; 0.90≤ω / (n×β)≤1.10; 0.90≤I / (2×fr×tan(β))≤1.10; wherein L is the distance between the two center points of the two light-emitting surfaces of two adjacent light-emitting modules in the first light-emitting module array; fts is the effective focal length of the light-emitting module in the slow axis direction of the transmitting module; β is half of the angle between the two slow axis direction light beams of two adjacent light-emitting modules in the first light-emitting module array after passing through the collimator; ω is the half field of view of the transmitting module; n is the total number of equal light-emitting modules; I is the distance between the two center points of two adjacent light receivers in the first light receiver array; fr is the effective focal length of the receiving module.

[0009] The first virtual line is perpendicular to any light-emitting surface, passes through its center point and connects the incident surface at a virtual point. The second virtual line connects the center point of any adjacent light-emitting surface and the virtual point. The angle between the first virtual line and the second virtual line is Ang, and the optical device satisfies the following conditions: 45 degrees ≤ Ang ≤ 89 degrees.

[0010] The optical device of the present invention may further include a second light emitting module array and a second light receiver array, wherein the second light emitting module array includes another plurality of light emitting modules, and the other plurality of light emitting modules are arranged along another slow axis direction of the other light emitting module: the first light emitting module array and the second light emitting module array are respectively arranged on both sides of the optical axis of the collimating mirror. The second light receiver array includes another plurality of light receivers. The first light receiver array and the second light receiver array are respectively arranged on both sides of the optical axis of the receiving mirror. The light beams emitted by the second light emitting module array are respectively incident on and penetrate the collimating mirror, then incident on the object to be tested and reflected by the object to be tested, then incident on and penetrate the receiving mirror, and finally incident on another plurality of light receivers of the second light receiver array.

[0011] The optical device satisfies at least one of the following conditions: 0.90≤y / (2×fts×tan(α))≤1.10; 0.90≤h / (2×fr×tan(α))≤1.10; 1.71≤α / β≤1.89; wherein y is the center distance between the first light-emitting module array and the second light-emitting module array; fts is the effective focal length of the light-emitting module in the transmitting module in the slow axis direction; α is half of the angle between the two fast axis light beams of the two closest light-emitting modules located in the first light-emitting module array and the second light-emitting module array after passing through the collimator; h is the center distance between the first light-receiver array and the second light-receiver array; fr is the effective focal length of the receiving module; β is half of the angle between the two slow axis light beams of the two adjacent light-emitting modules in the first light-emitting module array after passing through the collimator.

[0012] Another optical device of the present invention includes a transmitting module and a receiving module. The transmitting module includes a first light-emitting module array, a collimating mirror, and a transmitting end reflective component. The first light-emitting module array includes a plurality of light-emitting modules, and these light-emitting modules are arranged along the slow axis direction of the light-emitting module. The receiving module includes a receiving mirror, a first light receiver array, and a receiving end reflective component, and the first light receiver array includes a plurality of light receivers. The light beam emitted by the first light-emitting module array first enters and penetrates the collimating mirror, and then is reflected by the transmitting end reflective component to an object to be tested. The object to be tested reflects the light beam to the receiving end reflective component, and the receiving end reflective component reflects the light beam again, so that the light beam enters and penetrates the receiving mirror, and finally enters the first light receiver array and is received by these light receivers.

[0013] The collimator includes a first lens, which is a double convex lens with positive refractive power and includes a convex surface facing the first light-emitting module array and another convex surface facing away from the first light-emitting module array. The first lens is an aspherical lens.

[0014] The collimator may further include a second lens disposed between the first light emitting module array and the first lens, wherein the second lens is a plano-concave lens having negative refractive power and including a concave surface facing the first light emitting module array and a flat surface facing away from the first light emitting module array, and the second lens is a spherical lens.

[0015] The transmitting module may further include a first prism and a second prism, wherein the first prism is disposed between the first light-emitting module array and the second prism, and the second prism is disposed between the first prism and the collimator, and the collimator includes a first lens, a second lens, a third lens, and a fourth lens. The first lens, the second lens, the third lens, and the fourth lens are arranged in sequence along an optical axis. The first lens is a meniscus lens with negative refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the first lens is a spherical lens. The second lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the second lens is a spherical lens. The third lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the third lens is a spherical lens. The fourth lens is a biconvex lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and another convex surface facing away from the first light-emitting module array, and the fourth lens is a spherical lens. The third lens and the fourth lens are cemented together.

[0016] The collimator includes a first lens, a second lens, a third lens and a fourth lens. The first lens, the second lens, the third lens and the fourth lens are arranged in sequence along an optical axis. The first lens is a meniscus lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the first lens is a spherical lens. The second lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the second lens is a spherical lens. The third lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the third lens is a spherical lens. The fourth lens is a meniscus lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the fourth lens is a spherical lens.

[0017] The receiving mirror includes a fifth lens, a sixth lens and a seventh lens. The fifth lens, the sixth lens and the seventh lens are arranged in sequence along an optical axis. The fifth lens is a meniscus lens with positive refractive power, and includes a convex surface facing away from the first light receiver array and a concave surface facing the first light receiver array. The fifth lens is a spherical lens. The sixth lens is a meniscus lens with positive refractive power, and includes a convex surface facing away from the first light receiver array and a concave surface facing the first light receiver array. The sixth lens is a spherical lens. The seventh lens is a plano-concave lens with negative refractive power, and includes a concave surface facing away from the first light receiver array and a flat surface facing the first light receiver array. The seventh lens is a spherical lens.

[0018] The optical device of the present invention may further include an optical path turning component disposed between the transmitting end reflection component and the object to be measured, so that the light beam reflected by the transmitting end reflection component is first directed to the optical path turning component, and then the optical path is changed by the optical path turning component to be directed to the object to be measured. The object to be measured reflects the light beam to the optical path turning component, and the optical path turning component then changes the optical path of the light beam to the receiving end reflection component. The optical path turning component is a multi-faceted rotating mirror or a rotatable reflecting mirror.

[0019] The light emitting module and the optical device of the present invention have the following beneficial effects: the divergence angle of the light beam in the fast axis direction is compressed first, so that the light spot of the light beam no longer deviates far from the circle, which can improve the collimation of the light beam. When the light emitting module of the present invention is applied to the optical device for transmitting and receiving, the scanning precision and scanning range of the optical device can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a first embodiment of a light emitting module according to the present invention.

[0021] Figure 2A and 2B They are Figure 1 A schematic diagram of the light emitting module after removing the columnar optical component, the upper cover and the protective glass, viewed along the arrow direction A, and a cross-sectional view IV-IV.

[0022] Figure 3 yes Figure 1 A partial enlarged schematic diagram of the light emitting module after removing the upper cover and the protective glass, viewed along the arrow direction C.

[0023] Figure 4 It is a schematic diagram of the optical structure in the fast axis direction according to the second embodiment of the light emitting module of the present invention.

[0024] Figure 5 FIG. 1 is a schematic diagram of the optical structure of the transmitting module in the fast axis direction according to the first embodiment of the optical device of the present invention.

[0025] Figure 6 FIG. 1 is a schematic diagram of the optical structure of the fast axis direction of the transmitting module of the second embodiment of the optical device according to the present invention.

[0026] Figure 7 FIG. 4 is a schematic diagram of the optical structure of the transmitting module in the fast axis direction according to the third embodiment of the optical device of the present invention.

[0027] Figure 8 It is a schematic diagram of the optical structure in the fast axis direction according to the third embodiment of the light emitting module of the present invention.

[0028] Fig. 9 FIG. 1 is a schematic diagram of an optical structure in the slow axis direction according to a third embodiment of the light emitting module of the present invention.

[0029] Fig.10 4 is a schematic diagram of the system architecture of the slow axis direction of the transmitting module of the fourth embodiment of the optical device according to the present invention.

[0030] Fig.11 FIG. 4 is a schematic diagram of the system architecture of a receiving module of the fourth embodiment of the optical device according to the present invention.

[0031] Fig.12 , 13 They are Fig.10 , 11 A partial schematic diagram of .

[0032] Fig.14 yes Fig.12 An enlarged schematic diagram of .

[0033] Fig.15 FIG. 5 is a schematic diagram of a fast-axis system architecture of a transmitting module of a fifth embodiment of an optical device according to the present invention.

[0034] Fig.16 FIG. 5 is a schematic diagram of the system architecture of a receiving module of a fifth embodiment of an optical device according to the present invention.

[0035] Fig.17 , 18 They are schematic diagrams of the optical architectures of the fast axis direction and the slow axis direction of the transmitting module of the sixth embodiment of the optical device according to the present invention.

[0036] Fig.19 FIG. 4 is a schematic diagram of an optical structure of a receiving module of a sixth embodiment of an optical device according to the present invention. DETAILED DESCRIPTION

[0037] The present invention provides a light-emitting module, comprising: a light-emitting unit; a columnar optical component; two support units; and a base; wherein the support units are connected to the base, and some of the support units are higher than the connection between the base and the support units; wherein the light-emitting unit is arranged between the support units, and the light-emitting unit comprises a light-emitting surface, and the light-emitting surface can emit a light beam; wherein the columnar optical component comprises an incident surface, and the two ends of the columnar optical component are respectively connected to the support units, and the incident surface is directed toward the light-emitting surface, and a distance is included between the incident surface and the light-emitting surface, and the light beam emitted by the light-emitting surface enters the columnar optical component from the incident surface; wherein the light-emitting module satisfies the following conditions: 2≤D / E≤6; wherein D is the diameter of the columnar optical component, and E is the distance between the light-emitting unit and the incident surface.

[0038] The present invention provides an optical device, comprising: a transmitting module; and a receiving module; wherein the transmitting module comprises a light emitting module and a collimating mirror; wherein the receiving module comprises a receiving mirror and a light receiver; wherein the light beam emitted by the light emitting module first enters and penetrates the collimating mirror, then enters an object to be tested and is reflected by the object to be tested, then enters and penetrates the receiving mirror, and finally enters the light receiver.

[0039] The present invention provides another optical device, comprising: a transmitting module; and a receiving module; wherein the transmitting module comprises a first light-emitting module array and a collimating mirror, the first light-emitting module array comprises a plurality of light-emitting modules, and the light-emitting modules are arranged along the slow axis direction of the light-emitting module; wherein the light-emitting surfaces each comprise a center point; wherein the receiving module comprises a receiving mirror and a first light-receiver array, the first light-receiver array comprises a plurality of light-receivers; wherein the light beams emitted by the first light-emitting module array are respectively incident on and penetrate the collimating mirror, then incident on an object to be tested and reflected by the object to be tested, then incident on and penetrate the receiving mirror, and finally incident on the light-receivers of the first light-receiver array; wherein the optical device satisfies at least one of the following conditions: Y≤31mm; 0.90≤Y / (2 ×fts×tan(ω))≤1.10; 0.90≤Y / ((n-1)×L+d)≤1.10; 0.90≤H / (2×fr×tan(ω))≤1.10; wherein, Y is the distance from the first light-emitting surface to the last light-emitting surface along the slow axis direction in the first light-emitting module array; n is the total number of these light-emitting modules; L is the distance between the two center points of the two light-emitting surfaces of two adjacent light-emitting modules in the first light-emitting module array; d is the slow axis length of the light-emitting surface; fts is the effective focal length of the light-emitting module in the transmitting module in the slow axis direction; ω is the half field of view of the transmitting module; H is the distance from the center point of the first light receiver to the center point of the last light receiver in the first light receiver array; fr is the effective focal length of the receiving module.

[0040] The present invention provides another optical device, including: a transmitting module and a receiving module; wherein the transmitting module includes a first light-emitting module array, a collimating mirror and a transmitting end reflection component; wherein the first light-emitting module array includes a plurality of light-emitting modules, and the light-emitting modules are arranged along the slow axis direction of the light-emitting module; wherein the receiving module includes a receiving mirror, a first light receiver array and a receiving end reflection component, and the first light receiver array includes a plurality of light receivers; wherein the light beam emitted by the first light-emitting module array first enters and penetrates the collimating mirror, and then is reflected by the transmitting end reflection component to an object to be tested, and the object to be tested reflects the light beam to the receiving end reflection component, and the receiving end reflection component then reflects the light beam, so that the light beam enters and penetrates the receiving mirror, and finally enters the first light receiver array to be received by the light receivers.

[0041] See also Figure 1 , Figure 1 1 is a schematic diagram of a first embodiment of a light emitting module according to the present invention. The light emitting module 1 includes a base 20, a support unit 22, a support unit 24, a support unit 26, an upper cover 30, a heat sink 40, a heat sink substrate 50, a light emitting unit 60, a columnar optical component 70, and a protective glass 80. The support unit 22 includes a support unit end surface 221, and the support unit 24 includes a support unit end surface 241. The support units 22, 24, and 26 are respectively connected to the base 20, and the support unit end surfaces 221 and 241 are higher than the connection between the base 20 and the support units 22 and 24. The heat sink 40 is connected to the base 20, the heat sink substrate 50 is connected to the heat sink 40, the light emitting unit 60 includes a light emitting surface 61, and the light emitting unit 60 is connected to the heat sink substrate 50, so that the light emitting unit 60 is arranged between the support unit 221 and the support unit 241, and the light emitting surface 61 and the heat sink substrate 50 are perpendicular to each other. The cylindrical optical component 70 includes an incident surface 71, which faces the light-emitting surface 61. The two ends of the cylindrical optical component 70 are respectively connected to the support unit end surface 221 and the support unit end surface 241. The base 20 is connected to the upper cover 30, and the upper cover 30 is covered with a protective glass 80. The light beam (not shown) is emitted from the light-emitting surface 61, enters the incident surface 71 along the arrow direction B, penetrates the cylindrical optical component 70, and finally exits the light-emitting module 1 through the protective glass 80. The axial direction (i.e., the Figure 1 ) and the slow axis direction of the light emitting unit 60 (i.e. Figure 1 parallel to the horizontal direction of the light emitting unit 60 and parallel to the fast axis direction of the light emitting unit 60 (i.e. Figure 1 When the light beam passes through the cylindrical optical component 70, the divergence angle of the light beam in the fast axis direction will be compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. As for the divergence angle of the light beam in the slow axis direction, it does not change.

[0042] The columnar optical component 70 of the above-mentioned light-emitting module 1 is fixed on the support unit end surface 221 and the support unit end surface 241, which can greatly reduce the assembly time of the columnar optical component 70, and the optical axis (i.e., the center line of the light beam) is consistent with the structural center line of the light-emitting module 1, which is beneficial to the optical axis calibration of the subsequent optical device.

[0043] The assembly process of the light emitting module 1 will be further described below. Figure 2A , 2B as well as Figure 3 , Figure 2A , 2B They are Figure 1 A schematic diagram of the light-emitting module after removing the columnar optical component, the upper cover and the protective glass, and a cross-sectional view taken along the arrow direction A (i.e., from top to bottom), and FIG. Figure 3 yes Figure 1 The light module of FIG. 1 is a partially enlarged schematic diagram after removing the upper cover and protective glass, and visually viewing along the arrow direction C (i.e., from right to left). First, select Figure 2A In the base 20 shown in the figure, the distance between the line connecting the center point of the support unit end surface 221 and the center point of the support unit end surface 241 and the bonding surface 41 of the heat sink 40 is a, and then a heat sink substrate 50 of suitable thickness is selected, and the heat sink substrate 50 is fixed to the bonding surface 41 of the heat sink 40 and the light-emitting unit 60 respectively, so that the upper surface 62 of the light-emitting unit 60 is aligned with the line connecting the center point of the support unit end surface 221 and the center point of the support unit end surface 241, and the vertical distance between the center point of the light-emitting surface 61 (not shown) and the line connecting the center point of the support unit end surface 221 and the center point of the support unit end surface 241 is b (as shown in the figure). Figure 2B As shown in FIG. 1 , the optimal value of b in this embodiment is about 30 μm. Finally, the two ends of the columnar optical component 70 are fixed to the support unit end surface 221 and the support unit end surface 241 respectively. Figure 1 When the light emitting module 1 is freed from the upper cover 20 and the protective glass 80 and the cylindrical optical component 70 is a cylindrical lens, visually viewed along the arrow direction C, the following can be obtained: Figure 3 In this embodiment, when the light emitting module 1 meets the following condition (1), it is a preferred embodiment of the light emitting module of the present invention:

[0044] 2 ≤ D / E ≤ 6; (1)

[0045] Wherein, D is the diameter of the cylindrical optical component, and E is the distance between the light-emitting unit and the incident surface. When the light-emitting module 1 further satisfies condition (2): 4≤D / E≤5; it is an optimal embodiment of the light-emitting module of the present invention. In this embodiment, the diameter of the cylindrical optical component 70 is 134μm, the length is 1.26mm, and b is 30μm, and D / E=134 / 30≈4.47 satisfies condition (1) and further satisfies condition (2), which is an optimal embodiment of the present invention. The light-emitting module 1 can compress the fast axis divergence angle of the light beam from 40 degrees to 7 degrees.

[0046] The light-emitting unit 60 is a laser diode chip, and the columnar optical component 70 can be a rod lens, a cylindrical lens, an optical fiber, or a fast-axis collimation lens. The distance E between the light-emitting unit and the incident surface of condition (1) is the back focal length B of the columnar optical component. When the columnar optical component is a bare fiber without a fiber coating, the bare fiber with different diameters (i.e., outer diameters) D can be calculated theoretically to have different back focal lengths B. Table 1 is a data table of different bare fiber diameters D and their back focal lengths B, as well as the ratio of the bare fiber diameter D to the back focal length B. From Table 1, it can be obtained that the ratio of the bare fiber diameter D to the back focal length B is approximately between 2 and 6.

[0047] Table 1

[0048] Bare fiber diameter D(mm) Back focal length B(mm) Bare fiber diameter D / back focal length B 1.0 0.19 5.24 0.40 0.07 5.56 0.13 0.02 5.16 0.14 0.03 5.17 0.10 0.04 2.59 0.050 0.01 3.68

[0049] See also Figure 4 , Figure 4 FIG. 4 is a schematic diagram of the optical structure of the fast axis direction of the second embodiment of the light emitting module according to the present invention. The light emitting module 4 includes a light emitting unit LC4 and a single mode optical fiber SMF4 arranged in sequence along the optical axis OA4. The light emitting unit LC4 includes a light emitting surface LS4. The fast axis direction of the light emitting unit LC4 is Figure 4 The vertical direction of the slow axis is Figure 4 The vertical incident direction of the single-mode fiber SMF4 is Figure 4 The vertical incident direction of the image plane) and the slow axis direction of the light emitting unit LC4 of the light emitting module 4 ( Figure 4 The vertical incident direction of the image plane) is parallel to the fast axis direction of the light emitting unit LC4 of the light emitting module 4 ( Figure 4The light beam is emitted from the light emitting surface LS4, and then enters and penetrates the single-mode optical fiber SMF4. After the light beam in the fast axis direction penetrates the single-mode optical fiber SMF4, the divergence angle of the light beam in the fast axis direction will be compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. As for the divergence angle of the light beam in the slow axis direction, it does not change. Table 2 is the optical simulation data of the above-mentioned light emitting module 4 in the fast axis direction. From Table 2, it can be obtained that D=0.124mm, E=0.03mm, D / E=0.124 / 0.03≈4.13, that is, the light emitting module 4 meets the condition (1) and further meets the condition (2), which is an optimal embodiment of the present invention.

[0050] Table 2

[0051]

[0052] See also Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the optical structure of the fast axis direction of the transmitting module according to the first embodiment of the optical device of the present invention. The first embodiment of the optical device includes a transmitting module 5 and a receiving module (not shown). The transmitting module 5 emits a light beam to a measured object (not shown), and the measured object (not shown) reflects the light beam to the receiving module (not shown). The transmitting module 5 includes a Figure 4 The light emitting module 4 and the collimator CL5 are arranged in sequence along an optical axis OA5. The collimator CL5 includes a second lens L52 and a first lens L51 arranged in sequence along the optical axis OA5. The second lens L52 is a plano-concave lens with negative refractive power, and its concave surface S56 is a spherical surface facing the light emitting module 4, and the plane S57 is facing away from the light emitting module 4. The first lens L51 is a biconvex lens with positive refractive power, and its convex surface S58 is a spherical surface, and the convex surface S59 is an aspherical surface, and the convex surface S58 faces the light emitting module 4, and the convex surface S59 faces away from the light emitting module 4. The receiving module (not shown) includes a receiving mirror (not shown) and a light receiver (not shown). The light beam is emitted by the light emitting module 4, and the divergence angle of the light beam in the fast axis direction has been compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. As for the divergence angle of the light beam in the slow axis direction, it does not change. The light beam then enters and penetrates the collimator CL5, which can further compress the divergence angle of the light beam. Table 3 shows the optical simulation data of the emission module 5 in the fast axis direction.

[0053] Table 3

[0054]

[0055]

[0056] See also Figure 6 , Figure 6FIG. 1 is a schematic diagram of the optical structure of the fast axis direction of the transmitting module according to the second embodiment of the optical device of the present invention. The second embodiment of the optical device includes a transmitting module 6 and a receiving module (not shown). The transmitting module 6 emits a light beam to a measured object (not shown), and the measured object (not shown) reflects the light beam to the receiving module (not shown). The transmitting module 6 includes a Figure 4 The light emitting module 4 and the collimator CL6 are arranged in sequence along an optical axis OA6, and the collimator CL6 includes a first lens L61. The first lens L61 is a double convex lens with positive refractive power, and its convex surface S66 is a spherical surface, and the convex surface S67 is an aspherical surface. The convex surface S66 faces the light emitting module 4, and the convex surface S67 faces away from the light emitting module 4. The receiving module (not shown) includes a receiving mirror (not shown) and a light receiver (not shown). The light beam is emitted by the light emitting module 4, and the divergence angle of the light beam in the fast axis direction has been compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. As for the divergence angle of the light beam in the slow axis direction, it does not change. The light beam then enters and penetrates the collimator CL6, which can further compress the divergence angle of the light beam. Table 4 is the optical simulation data of the above-mentioned transmitting module 6 in the fast axis direction.

[0057] Table 4

[0058]

[0059] See also Figure 7 , Figure 71 is a schematic diagram of the optical structure of the fast axis direction of the transmitting module according to the third embodiment of the optical device of the present invention. The third embodiment of the optical device includes a transmitting module 7 and a receiving module (not shown). The transmitting module 7 emits a light beam to a measured object (not shown), and the measured object (not shown) reflects the light beam to the receiving module (not shown). The transmitting module 7 includes a light emitting module 4, a first prism P71, a second prism P72 and a collimator CL7 as described in the fourth figure, which are arranged in sequence along an optical axis OA7. The collimator CL7 includes a first lens L71, a second lens L72, a third lens L73 and a fourth lens L74, which are arranged in sequence along the optical axis OA7. The first lens L71 is a meniscus lens with negative refractive power, and its concave surface S710 and convex surface S711 are both spherical surfaces, the concave surface S710 faces the light emitting module 4, and the convex surface S711 faces away from the light emitting module 4. The second lens L72 is a meniscus lens with positive refractive power, and its concave surface S712 and convex surface S713 are both spherical surfaces, the concave surface S712 faces the light-emitting module 4, and the convex surface S713 faces away from the light-emitting module 4. The third lens L73 is a meniscus lens with negative refractive power, and its convex surface S714 and concave surface S715 are both spherical surfaces, the convex surface S714 faces the light-emitting module 4, and the concave surface S715 faces away from the light-emitting module 4. The fourth lens L74 is a double convex lens with positive refractive power, and the convex surface S715 and another convex surface S716 are both spherical surfaces, the convex surface S715 faces the light-emitting module 4, and the convex surface S716 faces away from the light-emitting module 4. The third lens L73 and the fourth lens L74 are glued together. The receiving module (not shown) includes a receiving mirror (not shown) and a light receiver (not shown). The light beam is emitted by the light emitting module 4, and the divergence angle of the light beam in the fast axis direction has been compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. As for the divergence angle of the light beam in the slow axis direction, it does not change. The light beam then enters and penetrates the first prism P71 and the second prism P72, and then enters the collimating lens CL7, which can further compress the divergence angle of the light beam. Table 5 shows the optical simulation data of the above-mentioned emission module 7 in the fast axis direction.

[0060] Table 5

[0061]

[0062]

[0063] See also Figure 8 , Figure 8 FIG. 8 is a schematic diagram of the optical structure of the fast axis direction of the light emitting module according to the third embodiment of the present invention. The light emitting module 8 includes a light emitting unit LC8 and a cylindrical lens RL8 arranged in sequence along an optical axis OA8. The light emitting unit LC8 includes a light emitting surface LS8. The fast axis direction of the light emitting unit LC8 is Figure 8 The vertical direction of the slow axis is Figure 8The vertical incident image direction, the axial direction of the cylindrical lens RL8 (that is, Figure 8 The vertical incident image direction) and the slow axis direction of the light emitting unit LC8 of the light emitting module 8 ( Figure 8 The vertical incident direction of the image plane) is parallel to the fast axis direction of the light emitting unit LC8 of the light emitting module 8 ( Figure 8 The light beam is emitted from the light-emitting surface LS8, and then enters and penetrates the cylindrical lens RL8. After the light beam in the fast axis direction penetrates the cylindrical lens RL8, the divergence angle of the light beam in the fast axis direction will be compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. The light-emitting module 8 satisfies the following conditions: 2≤D / E≤6; wherein D is the diameter of the cylindrical optical component, that is, the diameter of the cylindrical lens RL8, and E is the distance between the light-emitting unit and the incident surface, that is, the distance from the surface S81 to the surface S82. Table 6 is the optical simulation data of the above-mentioned light-emitting module 8 in the fast axis direction. From Table 6, it can be obtained that D=0.4mm, E=0.076mm, D / E=0.4 / 0.076≈5.26, that is, the light-emitting module 8 can meet the condition: 2≤D / E≤6.

[0064] Table 6

[0065]

[0066] See also Fig. 9 , Fig. 9 FIG. 1 is a schematic diagram of an optical structure of a light emitting module according to a third embodiment of the present invention in the slow axis direction. The slow axis direction of the light emitting unit LC8 is Fig. 9 The vertical direction of the fast axis is Fig. 9 The vertical incident image direction, the axial direction of the cylindrical lens RL8 (that is, Fig. 9 The vertical direction) and the slow axis direction of the light emitting unit LC8 of the light emitting module 8 ( Fig. 9 The vertical direction of the light emitting unit LC8 of the light emitting module 8 is parallel to the fast axis direction (i.e. Figure 8 The light beam is emitted from the light emitting surface LS8, and then enters and penetrates the cylindrical lens RL8, and the divergence angle of the light beam in the slow axis direction does not change. Table 7 shows the optical simulation data of the light emitting module 8 in the slow axis direction.

[0067] Table 7

[0068]

[0069] Please also see Fig.10 , Fig.11 , Fig.12 , Fig.13 as well as Fig.14 . Fig.10 is a schematic diagram of the slow axis system architecture of the transmitting module according to the fourth embodiment of the optical device of the present invention, Fig.11 is a schematic diagram of the system architecture of a receiving module of a fourth embodiment of an optical device according to the present invention, Fig.12 yes Fig.10 A partial schematic diagram of Fig.13 yes Fig.11 A partial schematic diagram of Fig.14 yes Fig.12 The fourth embodiment of the optical device includes a transmitting module 10 and a receiving module 11. The transmitting module 10 emits a light beam to an object to be measured (not shown), and the object to be measured (not shown) reflects the light beam to the receiving module 11. The transmitting module 10 includes a first light emitting module array LDA1 and a collimating lens CL10. The first light emitting module array LDA1 includes 16 Figure 8 The light emitting modules 8 are arranged in a straight line at equal intervals, so that the direction of the straight line is the slow axis direction of each light emitting module 8 ( Fig.10 The receiving module 11 includes a first light receiver array PDA1 and a receiving mirror RecL11. The first light receiver array PDA1 includes 16 light receivers OR11, and the 16 light receivers OR11 are arranged in a straight line at equal intervals. The distance from the first light emitting surface to the last light emitting surface in the first light emitting module array LDA1 along the slow axis direction is Y (reference Fig.10 ), the slow axis length of the light-emitting surface is d (reference Fig.10 ), the effective focal length of the slow axis compression laser diode in the transmitting module 10 in the slow axis direction is fts, and the half field angle of the transmitting module 10 is ω (reference Fig.10 ), the distance between the two center points of the two light-emitting surfaces of two adjacent light-emitting modules in the first light-emitting module array LDA1 is L (reference Fig.12 ), in the first light emitting module array LDA1, half of the angle between the two slow axis direction light beams of two adjacent light emitting modules after passing through the collimator CL10 is β (reference Fig.12 ), in the first light receiver array PDA1, the distance from the center point of the first light receiver to the center point of the last light receiver is H (reference Fig.11 ), the effective focal length of the receiving module 11 is fr, the total number of the light emitting modules 8 is n, and the distance between the two center points of two adjacent light receivers OR11 in the first light receiver array PDA1 is I (reference Fig.13 ), the first virtual line VL1 is a straight line perpendicular to any light emitting surface LS8 and passing through its center point CP86 and connecting the incident surface to the virtual point VP (reference Fig.14 ), the second virtual line VL2 is a straight line connecting the center point CP87 of the adjacent light-emitting surface LS8 and the virtual point VP (reference Fig.14 ), the angle between the first virtual line VL1 and the second virtual line VL2 is Ang (reference Fig.14). The fourth embodiment of the optical device satisfies at least one of the following conditions:

[0070] Y ≤ 31 mm; (3)

[0071] 0.90 ≤ Y / (2 × fts × tan(ω)) ≤ 1.10; (4)

[0072] 0.90 ≤ Y / ((n-1) × L + d) ≤ 1.10; (5)

[0073] 0.90 ≤ H / (2 × fr × tan(ω)) ≤ 1.10; (6)

[0074] 0.90 ≤ L / (2 × fts × tan(β)) ≤ 1.10 (7)

[0075] 0.90 ≤ ω / (n × β) ≤ 1.10; (8)

[0076] 0.90 ≤ I / (2 × fr × tan(β)) ≤ 1.10; (9)

[0077] 45 degrees ≤ Ang ≤ 89 degrees. (10)

[0078] Please also see Fig.15 as well as Fig.16 . Fig.15 is a schematic diagram of the fast axis system architecture of the transmitting module according to the fifth embodiment of the optical device of the present invention, Fig.16 1 is a schematic diagram of the optical structure of the receiving module of the fifth embodiment of the optical device according to the present invention. The fifth embodiment of the optical device includes a transmitting module 15 and a receiving module 16. The transmitting module 15 emits a light beam to an object to be measured (not shown), and the object to be measured (not shown) reflects the light beam to the receiving module 16. The transmitting module 15 includes a first light emitting module array LDA151, a second light emitting module array LDA152 and a collimating lens CL15. The first light emitting module array LDA151 and the second light emitting module array LDA152 can be as follows: Fig.10 The first light emitting module array LDA1 is shown. The first light emitting module array LDA151 and the second light emitting module array LDA152 are arranged on both sides of the optical axis TXOA15 with the optical axis TXOA15 as the symmetric center. The receiving module 16 includes a first light receiver array PDA16, a second light receiver array PDA17 and a receiving mirror RecL16. The first light receiver array PDA16 and the second light receiver array PDA17 can be as follows Fig.11The first light receiver array PDA1 is shown. The first light receiver array PDA16 and the second light receiver array PDA17 are arranged on both sides of the optical axis RXOA16 with the optical axis RXOA16 as the symmetric center. The center distance between the first light emitting module array LDA151 and the second light emitting module array LDA152 is y (refer to Fig.15 ), the effective focal length of the light emitting module in the emitting module 15 in the slow axis direction is fts, and the two fast axis direction light beams of the two closest light emitting modules in the first light emitting module array LDA151 and the second light emitting module array LDA152, after passing through the collimator CL15, the half of the angle between the two fast axis direction light beams is α (reference Fig.15 ), the center distance between the first light receiver array PDA16 and the second light receiver array PDA17 is h (reference Fig.16 ), the effective focal length of the receiving module 15 is fr, and the definition of β is Fig.12 The fifth embodiment of the optical device satisfies at least one of the following conditions:

[0079] 0.90 ≤ y / (2 × fts × tan(α)) ≤ 1.10; (11)

[0080] 0.90 ≤ h / (2 × fr × tan(α)) ≤ 1.10; (12)

[0081] 1.71 ≤ α / β ≤ 1.89. (13)

[0082] See also Fig.17 , Fig.18 as well as Fig.19 , Fig.17 FIG. 6 is a schematic diagram of the optical structure of the transmitting module in the fast axis direction according to the sixth embodiment of the optical device of the present invention. Fig.18 FIG. 6 is a schematic diagram of the optical structure of the emitting module in the slow axis direction according to the sixth embodiment of the optical device of the present invention. Fig.19It is a schematic diagram of the optical architecture of the receiving module of the sixth embodiment of the optical device according to the present invention. The system architecture of the sixth embodiment of the optical device is the same as the system architecture of the fifth embodiment of the optical device. The sixth embodiment of the optical device includes a transmitting module 17 and a receiving module 19. The transmitting module 17 emits a light beam to an object to be measured (not shown), and the object to be measured (not shown) reflects the light beam to the receiving module 19. The transmitting module 17 includes a first light-emitting module array LDA171, a second light-emitting module array LDA172 and a collimating lens CL17, and the first light-emitting module array LDA171 and the second light-emitting module array LDA172 are arranged on both sides of the optical axis TXOA17 with an optical axis TXOA17 as the center of symmetry. The first light-emitting module array LDA171 includes 16 light-emitting modules 8, and the 16 light-emitting modules 8 are arranged in a straight line at equal intervals, so that the direction of the straight line is the slow axis direction of each light-emitting module 8 ( Fig.17 The second light emitting module array LDA172 has the same structure as the first light emitting module array LDA171. The fast axis direction of the light emitting module 8 is Fig.17The collimator CL17 includes a first lens L171, a second lens L172, a third lens L173 and a fourth lens L174. The first lens L171 is a meniscus lens with positive refractive power, and its convex surface S174 and concave surface S175 are both spherical surfaces, the convex surface S174 faces the first light-emitting module array LDA171 and the second light-emitting module array LDA172, and the concave surface S175 faces away from the first light-emitting module array LDA171 and the second light-emitting module array LDA172. The second lens L172 is a meniscus lens with negative refractive power, and its convex surface S176 and concave surface S177 are both spherical surfaces, the convex surface S176 faces the first light-emitting module array LDA171 and the second light-emitting module array LDA172, and the concave surface S177 faces away from the first light-emitting module array LDA171 and the second light-emitting module array LDA172. The third lens L173 is a meniscus lens with positive refractive power, and its concave surface S178 and convex surface S179 are both spherical surfaces, the concave surface S178 faces the first light-emitting module array LDA171 and the second light-emitting module array LDA172, and the convex surface S179 faces away from the first light-emitting module array LDA171 and the second light-emitting module array LDA172. The fourth lens L174 is a meniscus lens with positive refractive power, the convex surface S1710 and the concave surface S1711 are both spherical surfaces, the convex surface S1710 faces the first light-emitting module array LDA171 and the second light-emitting module array LDA172, and the concave surface S1711 faces away from the first light-emitting module array LDA171 and the second light-emitting module array LDA172. The receiving module 19 includes a first light receiver array PDA191, a second light receiver array PDA192, a filter OF19, and a receiving mirror RecL19 arranged in sequence along the optical axis RXOA19. The first photoreceiver array PDA191 includes 16 photoreceivers such as Fig.11The optical receivers OR11, 16 optical receivers OR11 are arranged in a straight line at equal intervals. The first optical receiver array PDA191 and the second optical receiver array PDA192 have the same structure. The first optical receiver array PDA191 and the second optical receiver array PDA192 are arranged on both sides of the optical axis RXOA19 with the optical axis RXOA19 as the symmetric center. The receiving mirror RecL19 includes a fifth lens L195, a sixth lens L196 and a seventh lens L197. The fifth lens L195 is a meniscus lens with positive refractive power, and its convex surface S191 and concave surface S192 are both spherical surfaces, the convex surface S191 faces away from the first optical receiver array PDA191 and the second optical receiver array PDA192, and the concave surface S192 faces the first optical receiver array PDA191 and the second optical receiver array PDA192. The sixth lens L196 is a meniscus lens with positive refractive power, and its convex surface S193 and concave surface S194 are both spherical surfaces, the convex surface S193 faces away from the first light receiver array PDA191 and the second light receiver array PDA192, and the concave surface S194 faces the first light receiver array PDA191 and the second light receiver array PDA192. The third lens L197 is a plano-concave lens with negative refractive power, and its concave surface S195 is a spherical surface, the concave surface S195 faces away from the first light receiver array PDA191 and the second light receiver array PDA192, and the plane S196 faces the first light receiver array PDA191 and the second light receiver array PDA192. The two surfaces S197 and S198 of the filter OF19 are both planes. The light beam is emitted by the first light emitting module array LDA171, and the divergence angle of the light beam in the fast axis direction has been compressed, so that the light beam in the fast axis direction is concentrated, which can improve the collimation of the light beam in the fast axis direction. As for the divergence angle of the light beam in the slow axis direction, it does not change. The light beam then enters the collimator CL17, which can further compress the divergence angle of the light beam. The light beam reflected by the object is incident on the receiving module 19 through the fifth lens L195, and is finally received by the first light receiver array PDA191 and the second light receiver array PDA192. Table 8 is the optical simulation data of the first light emitting module array LDA171 of the above-mentioned transmitting module 17 in the fast axis direction. As for the optical simulation data of the second light emitting module array LDA172 in the fast axis direction, it is the same as Table 8. Table 9 is the optical simulation data of the first light emitting module array LDA171 of the above-mentioned transmitting module 17 in the slow axis direction, and the optical simulation data of the second light emitting module array LDA172 in the slow axis direction is the same as Table 9. Table 10 shows the optical simulation data of the first optical receiver array PDA191 of the receiving module 19 . The optical simulation data of the second optical receiver array PDA192 of the receiving module 19 are the same as those in Table 10 .

[0083] Table 8

[0084]

[0085] Table 9

[0086]

[0087] Table 10

[0088]

[0089]

[0090] Table 11 shows the relevant parameter values ​​of the sixth embodiment of the optical device and the calculated values ​​corresponding to conditions (3) to (13). It can be seen from Table 11 that the sixth embodiment of the optical device can meet the requirements of conditions (3) to (13).

[0091] Table 11

[0092]

[0093] The seventh embodiment of the optical device of the present invention is described below. The seventh embodiment of the optical device (not shown) includes a transmitting module, a receiving module, and an optical path turning component. The transmitting module includes a first light emitting module array, a collimating lens, and a transmitting end reflecting component. The receiving module includes a receiving lens, a first light receiving array, and a receiving end reflecting component. The first light emitting module array includes 16 Figure 8 The light emitting modules 8 are arranged at equal intervals along the slow axis direction of the light emitting modules 8. The first light receiver array includes 16 light emitting modules 8. Fig.11 The optical receiver OR11. The light beam emitted by the first light-emitting module array first enters and penetrates the collimating mirror, then is reflected by the transmitting end reflection component to the optical path turning component, and then changes the optical path through the optical path turning component to an object to be tested. The object to be tested reflects the light beam to the optical path turning component, and the optical path turning component changes the optical path of the light beam to the receiving end reflection component. The receiving end reflection component reflects the light beam so that the light beam enters and penetrates the receiving mirror, and finally enters the first light receiver array and is received by the light receiver. The above-mentioned optical path turning component is a multi-faceted rotating mirror or a rotatable reflector. During operation, the multi-faceted rotating mirror and the rotatable reflector can rotate to increase the scanning range of the light beam.

[0094] The seventh embodiment (not shown) of the optical device of the above invention, wherein the collimator comprises a first lens, wherein the first lens is a biconvex lens having positive refractive power and comprising a convex surface facing the first light-emitting module array and another convex surface facing away from the first light-emitting module array, and the first lens is an aspherical lens. The optical simulation data of the first lens can be shown as the first lens L61 in Table 4.

[0095] The seventh embodiment (not shown) of the optical device of the above invention, the collimator may further include a second lens disposed between the first light-emitting module array and the first lens, the second lens is a plano-concave lens with negative refractive power, and includes a concave surface facing the first light-emitting module array and a flat surface facing away from the first light-emitting module array, the second lens is a spherical lens. The optical simulation data of the second lens may be shown as the second lens L52 in Table 3.

[0096] In the seventh embodiment (not shown) of the optical device of the above invention, the transmitting module may further include a first prism and a second prism, wherein the first prism is disposed between the first light-emitting module array and the second prism, and the second prism is disposed between the first prism and the collimating lens. The collimating lens includes a first lens, a second lens, a third lens, and a fourth lens. The first lens, the second lens, the third lens, and the fourth lens are arranged in sequence along an optical axis. The first lens is a meniscus lens having a negative refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the first lens is a spherical lens. The second lens is a meniscus lens having a positive refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the second lens is a spherical lens. The third lens is a meniscus lens having a negative refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the third lens is a spherical lens. The fourth lens is a double convex lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and another convex surface facing away from the first light-emitting module array. The fourth lens is a spherical lens. The third lens and the fourth lens are glued together. The optical simulation data of the first prism, the second prism, the first lens, the second lens, the third lens and the fourth lens can be shown in Table 5 for the first prism P71, the second prism P72, the first lens L71, the second lens L72, the third lens L73 and the fourth lens L74.

[0097] The seventh embodiment (not shown) of the optical device of the above invention, its collimator includes a first lens, a second lens, a third lens, and a fourth lens. The first lens, the second lens, the third lens, and the fourth lens are arranged in sequence along an optical axis. The first lens is a meniscus lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the first lens is a spherical lens. The second lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the second lens is a spherical lens. The third lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the third lens is a spherical lens. The fourth lens is a meniscus lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the fourth lens is a spherical lens. Optical simulation data of the first lens, the second lens, the third lens and the fourth lens may be as shown in Table 8 for the first lens L171, the second lens L172, the third lens L173 and the fourth lens L174.

[0098] The seventh embodiment (not shown) of the optical device of the above invention, its receiving mirror includes a fifth lens, a sixth lens and a seventh lens. The fifth lens, the sixth lens and the seventh lens are arranged in sequence along an optical axis. The fifth lens is a meniscus lens with positive refractive power, and includes a convex surface facing away from the first light receiver array and a concave surface facing the first light receiver array, and the fifth lens is a spherical lens. The sixth lens is a meniscus lens with positive refractive power, and includes a convex surface facing away from the first light receiver array and a concave surface facing the first light receiver array, and the sixth lens is a spherical lens. The seventh lens is a plano-concave lens with negative refractive power, and includes a concave surface facing away from the first light receiver array and a flat surface facing the first light receiver array, and the seventh lens is a spherical lens. The optical simulation data of the fifth lens, the sixth lens and the seventh lens can be shown as the fifth lens L195, the sixth lens L196 and the seventh lens L197 in Table 10.

[0099] Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A light emitting module, characterized in that: include: Light emitting unit; Columnar optical components; Support unit; as well as Base; The support unit is connected to the base, and a portion of the support unit is higher than the connection between the base and the support unit; The light-emitting unit is disposed on the base, and the light-emitting unit includes a light-emitting surface, and the light-emitting surface can emit a light beam; The cylindrical optical component includes an incident surface, two ends of the cylindrical optical component are respectively connected to the supporting unit, and the incident surface faces the light-emitting surface and a distance is provided between the incident surface and the light-emitting unit, and the light beam emitted by the light-emitting surface enters the cylindrical optical component from the incident surface; The light-emitting module meets the following conditions: 2≤D / E≤6; Wherein, D is the diameter of the cylindrical optical component, and E is the distance between the light-emitting unit and the incident surface.

2. The light emitting module according to claim 1, characterized in that: The light emitting unit is a laser diode, and the columnar optical component is a columnar lens, a cylindrical lens, an optical fiber or a fast axis collimating lens.

3. An optical device, characterized in that: include: Transmitter module; as well as Receiver module; The transmitting module comprises the light-emitting module as claimed in claim 1 and a collimating lens; The receiving module includes a receiving mirror and a light receiver; The light beam emitted by the light emitting module first enters and penetrates the collimating mirror, then enters an object to be tested and is reflected by the object to be tested, then enters and penetrates the receiving mirror, and finally enters the light receiver.

4. An optical device, characterized in that: include: Transmitter module; as well as Receiver module; The emission module includes a first light-emitting module array and a collimating lens, wherein the first light-emitting module array includes a plurality of light-emitting modules as claimed in claim 1, and the light-emitting modules are arranged along the slow axis direction of the light-emitting module; wherein each of the light-emitting surfaces includes a center point; The receiving module includes a receiving mirror and a first light receiver array, and the first light receiver array includes a plurality of light receivers; The light beams emitted by the first light emitting module array are incident on and penetrate the collimating lens first, then incident on an object to be tested and reflected by the object to be tested, then incident on and penetrate the receiving lens, and finally incident on the light receivers of the first light receiver array respectively; The optical device satisfies at least one of the following conditions: Y≤31mm; 0.90≤Y / (2×fts×tan(ω))≤1.10; 0.90≤Y / ((n-1)×L+d)≤1.10; 0.90≤H / (2×fr×tan(ω))≤1.10; Among them, Y is the distance from the first light-emitting surface to the last light-emitting surface along the slow axis direction in the first light-emitting module array; n is the total number of these light-emitting modules; L is the distance between the two center points of the two light-emitting surfaces of two adjacent light-emitting modules in the first light-emitting module array; d is the slow axis length of the light-emitting surface; fts is the effective focal length of the light-emitting module in the transmitting module in the slow axis direction; ω is the half field of view of the transmitting module; H is the distance from the center point of the first light receiver to the center point of the last light receiver in the first light receiver array; fr is the effective focal length of the receiving module.

5. The optical device according to claim 4, characterized in that The optical device satisfies at least one of the following conditions: 0.90≤L / (2×fts×tan(β))≤1.10; 0.90≤ω / (n×β)≤1.10; 0.90≤I / (2×fr×tan(β))≤1.10; Wherein, L is the distance between the two center points of the two light-emitting surfaces of two adjacent light-emitting modules in the first light-emitting module array; fts is the effective focal length of the light-emitting module in the slow axis direction in the transmitting module; β is half of the angle between the two slow axis direction light beams of two adjacent light-emitting modules in the first light-emitting module array after passing through the collimator; ω is the half field of view of the transmitting module; n is the total number of these light-emitting modules; I is the distance between the two center points of two adjacent light receivers in the first light receiver array; fr is the effective focal length of the receiving module.

6. The optical device according to claim 4, characterized in that The first virtual line is perpendicular to any light-emitting surface and passes through its center point and connects the incident surface at a virtual point. The second virtual line connects the center point of any adjacent light-emitting surface and the virtual point. The angle between the first virtual line and the second virtual line is Ang, wherein the optical device satisfies the following conditions: 45 degrees ≤ Ang ≤ 89 degrees.

7. The optical device according to any one of claims 4 to 6, characterized in that It further includes a second light emitting module array and a second light receiver array, wherein: The second light-emitting module array comprises another plurality of light-emitting modules as claimed in claim 1, wherein the another plurality of light-emitting modules are arranged along another slow axis direction of the another light-emitting module; The first light emitting module array and the second light emitting module array are respectively arranged on two sides of the optical axis of the collimator; The second light receiver array includes another plurality of light receivers; The first light receiver array and the second light receiver array are respectively disposed on two sides of the optical axis of the receiving mirror; and The light beams emitted by the second light emitting module array are incident on and penetrate the collimating lens first, then incident on and reflected by the object to be tested, then incident on and penetrate the receiving lens, and finally incident on the other plurality of light receivers of the second light receiver array.

8. The optical device according to claim 7, characterized in that The optical device satisfies at least one of the following conditions: 0.90≤y / (2×fts×tan(α))≤1.10; 0.90≤h / (2×fr×tan(α))≤1.10; 1.71≤α / β≤1.89； Among them, y is the center distance between the first light-emitting module array and the second light-emitting module array; fts is the effective focal length of the light-emitting module in the transmitting module in the slow axis direction; α is half of the angle between the two fast axis direction light beams of the two closest light-emitting modules located in the first light-emitting module array and the second light-emitting module array after passing through the collimator; h is the center distance between the first light receiver array and the second light receiver array; fr is the effective focal length of the receiving module; β is half of the angle between the two slow axis direction light beams of the two adjacent light-emitting modules in the first light-emitting module array after passing through the collimator.

9. An optical device, characterized in that: include: Transmitter module; as well as Receiver module; The transmitting module includes a first light-emitting module array, a collimating lens and a transmitting end reflection component; The first light-emitting module array comprises a plurality of light-emitting modules as claimed in claim 1, and the light-emitting modules are arranged along the slow axis direction of the light-emitting modules; The receiving module includes a receiving mirror, a first light receiver array and a receiving end reflection component, and the first light receiver array includes a plurality of light receivers; The light beam emitted by the first light emitting module array first enters and penetrates the collimating mirror, and then is reflected by the transmitting end reflection component to an object to be tested. The object to be tested reflects the light beam to the receiving end reflection component, and the receiving end reflection component further reflects the light beam, so that the light beam enters and penetrates the receiving mirror, and finally enters the first light receiver array and is received by these light receivers.

10. The optical device according to claim 9, characterized in that The collimator includes a first lens, which is a double convex lens with positive refractive power and includes a convex surface facing the first light-emitting module array and another convex surface facing away from the first light-emitting module array. The first lens is an aspherical lens.

11. The optical device according to claim 10, characterized in that The collimator further includes a second lens disposed between the first light emitting module array and the first lens. The second lens is a plano-concave lens with negative refractive power and includes a concave surface facing the first light emitting module array and a flat surface facing away from the first light emitting module array. The second lens is a spherical lens.

12. The optical device according to claim 9, characterized in that The emission module further includes a first prism and a second prism, wherein the first prism is disposed between the first light-emitting module array and the second prism, and the second prism is disposed between the first prism and the collimator, wherein the collimator includes: First lens; Second lens; a third lens; and The fourth lens; wherein the first lens, the second lens, the third lens and the fourth lens are arranged in sequence along an optical axis; The first lens is a meniscus lens with negative refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the first lens is a spherical lens; The second lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the second lens is a spherical lens; The third lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the third lens is a spherical lens; The fourth lens is a double convex lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and another convex surface facing away from the first light-emitting module array, and the fourth lens is a spherical lens; The third lens and the fourth lens are cemented together.

13. The optical device according to claim 9, characterized in that The collimator includes: First lens; Second lens; a third lens; and The fourth lens; wherein the first lens, the second lens, the third lens and the fourth lens are arranged in sequence along an optical axis; The first lens is a meniscus lens with positive refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the first lens is a spherical lens; The second lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array, and the second lens is a spherical lens; The third lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first light-emitting module array and a convex surface facing away from the first light-emitting module array, and the third lens is a spherical lens; The fourth lens is a meniscus lens with positive refractive power and includes a convex surface facing the first light-emitting module array and a concave surface facing away from the first light-emitting module array. The fourth lens is a spherical lens.

14. The optical device according to claim 9, characterized in that The receiving mirror includes: The fifth lens; a sixth lens; and The seventh lens; wherein the fifth lens, the sixth lens and the seventh lens are arranged in sequence along an optical axis; The fifth lens is a meniscus lens with positive refractive power, and includes a convex surface facing away from the first light receiver array and a concave surface facing the first light receiver array, and the fifth lens is a spherical lens; The sixth lens is a meniscus lens with positive refractive power, and includes a convex surface facing away from the first light receiver array and a concave surface facing the first light receiver array, and the sixth lens is a spherical lens; The seventh lens is a plano-concave lens with negative refractive power and includes a concave surface facing away from the first light receiver array and a flat surface facing the first light receiver array. The seventh lens is a spherical lens.

15. The optical device according to claim 9, characterized in that It further includes an optical path turning component arranged between the transmitting end reflection component and the object to be tested, so that the light beam reflected by the transmitting end reflection component is first directed to the optical path turning component, and then the optical path is changed by the optical path turning component to be directed to the object to be tested. The object to be tested reflects the light beam to the optical path turning component, and the optical path turning component then changes the optical path of the light beam to the receiving end reflection component. The optical path turning component is a multi-faceted rotating mirror or a rotatable reflecting mirror.

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