TWM463390U - Light guide element light sensing module and optical mouse - Google Patents

Description

Light guiding element, light sensing module and optical mouse

The invention relates to a light guiding component and a light sensing module, in particular to a light guiding component and a light sensing module applicable to an optical mouse.

The mouse is a common computer input device, which allows the user to input and edit data through the corresponding positioning indicators on the mobile computer screen and through the buttons and scroll wheels. A typical optical mouse, as described in the Patent No. I348634 of the Republic of China, is operable by a user on a surface and includes a light source, an image sensor, and a cymbal. The crucible is disposed between the image sensor and the surface, and the light source is disposed beside the crucible. Accordingly, the light emitted by the light source can be transmitted from the crucible to the surface under the crucible, reflected by the surface, and then transmitted to the image sensor through the crucible, and then the circuit unit inside the image sensor and the optical mouse can be The interference fringe of the received light determines the moving direction and displacement of the positioning index on the computer screen.

However, the above optical mouse has the disadvantage that its light source is disposed horizontally on the side of the crucible, so that the light source together with the crucible needs to occupy a large plane space, resulting in an increase in the volume of the optical mouse. In addition, the light source, the cymbal and the image sensor are independent components, and are separately assembled to the optical mouse. The assembly is not assembled in a modular manner, so it is not conducive to the production and assembly process.

Therefore, it is an object of the present invention to provide a light guiding element which can miniaturize an optical mouse and is easy to assemble and manufacture.

Therefore, the novel light guiding element is disposed in a casing and is used in conjunction with an optical transceiver unit disposed in the casing. The housing is movably disposed on a work surface and has an opening adjacent the work surface. The optical transceiver unit comprises a circuit board, a light-emitting component and a light-sensing component. The circuit board has a lower surface, and the light-emitting component is disposed adjacent to the photosensitive component on a lower surface of the circuit board.

The light guiding element comprises a body that can penetrate light and is interposed between the optical transceiver unit and the working surface and has an opposite inner surface and an outer surface. The inner surface is adjacent to a lower surface of the circuit board, the outer surface being adjacent to the work surface. The inner surface of the body forms a pair of inner light collecting portions corresponding to the positions of the light emitting elements and a pair of inner light guiding portions for the positions of the photosensitive elements, and the outer surface of the body forms a pair of outer light guiding portions for the position of the inner collecting portion and A pair of external light collecting portions that should be in the position of the inner light guiding portion.

The light emitted by the light-emitting element is concentrated and transmitted by the inner light collecting portion to the outer light guiding portion, and the outer light guiding portion is turned through the opening of the casing to illuminate the working surface, and the light reflected by the working surface The outer light collecting portion is condensed by the opening of the casing and transmitted to the inner light guiding portion, and then the inner light guiding portion is turned and irradiated to the photosensitive member.

In an embodiment, the inner collecting portion and the outer collecting portion are respectively It is a convex lens. The outer light guiding portion is substantially columnar and protrudes toward the working surface, and has a first surface and a first inclined surface that closes the circumferential surface, and the first inclined surface is adjacent to the work in a direction toward the outer light collecting portion. The direction of the face gradually extends obliquely. The inner light guiding portion protrudes toward the circuit board and has a right-angled triangular cross section, and has a second inclined surface extending obliquely in a direction toward the inner light collecting portion toward a direction adjacent to the circuit board.

a first optical axis of the inner concentrating portion, a second optical axis of the outer concentrating portion, a first normal line perpendicular to the first inclined surface of the outer light guiding portion, and a vertical inner guiding light The second normal of the second bevel of the part. The first optical axis passes through the outer light guiding portion and the light emitting element, and the second optical axis passes through the inner light guiding portion, and the angle between the first optical axis and the first normal line ranges from 30 degrees to 39 degrees, and the angle between the second optical axis and the second normal line ranges from 10 degrees to 20 degrees.

In another embodiment, the inner concentrating portion and the outer concentrating portion are each a convex lens. The outer light guiding portion protrudes toward the working surface and has a substantially triangular cross section, and has a first inclined surface and a second inclined surface connected thereto. The first inclined surface gradually extends obliquely away from the working surface in a direction away from the outer light collecting portion, and the second inclined surface is interposed between the first inclined surface and the outer collecting portion, and faces the outer gathering The direction of the light portion gradually extends obliquely away from the working surface. The inner light guiding portion protrudes toward the circuit board and has a right-angled triangular cross section, and has a third inclined surface extending obliquely in a direction toward the inner light collecting portion toward a direction adjacent to the circuit board.

a first optical axis defining the inner concentrating portion, a second optical axis of the outer concentrating portion, and a first first slanting surface perpendicular to the outer guiding portion a normal line and a second normal line that is perpendicular to the third slope of the inner light guiding portion. The first optical axis passes through the outer light guiding portion and the light emitting element, and the second optical axis passes through the inner light guiding portion. The angle between the first optical axis and the first normal line is 60 degrees, and the angle between the second optical axis and the second normal line ranges from 10 degrees to 20 degrees.

Another object of the present invention is to provide a light sensing module including the above optical transceiver unit and light guiding element. The light sensing module is disposed in a housing and movably used on a working surface, the housing having an opening adjacent to the working surface. The light sensing module transmits and receives light to the working surface through the opening of the housing.

Preferably, in the light sensing module, the light-emitting element is a vertical cavity surface-emitting laser or a light-emitting diode, and the photosensitive element is a complementary gold-oxygen half-pixel array sensor.

Still another object of the present invention is to provide an optical mouse using the above-described light sensing module. The optical mouse is used on a work surface and includes a housing and a light sensing module as described above. The housing is movably mounted on the work surface and has an opening adjacent the work surface. The light sensing module is disposed in the housing corresponding to the opening thereof.

The effect of this new model is:

(1) The inner light collecting portion of the light guiding element and the outer light guiding portion vertically correspond to the light emitting element, and the inner light guiding portion and the outer light collecting portion of the light guiding element vertically correspond to the light receiving element, so that the light emitting element and the light emitting element The photosensitive elements may be disposed adjacent to the same side (lower surface) of the circuit board without providing the light emitting elements on the sides of the light guiding elements. This design can reduce the plane space occupied by the light sensing module, and can effectively reduce the volume of the optical mouse.

(2) The light-emitting element and the light-sensing element can be directly mounted on the circuit board to form an optical transceiver unit. In the production process of the optical mouse, it is not necessary to separately install each individual component in the housing of the optical mouse. This modular design simplifies the assembly process of the optical mouse and is advantageous for manufacturing.

100‧‧‧ optical mouse

47‧‧‧External Light Guide

1‧‧‧shell

471‧‧‧Week

11‧‧‧ openings

472‧‧‧First slope

2‧‧‧Light sensing module

48‧‧‧External Light Guide

3‧‧‧Optical transceiver unit

481‧‧‧ first slope

31‧‧‧ boards

482‧‧‧second bevel

311‧‧‧ lower surface

91‧‧‧Working face

32‧‧‧Lighting elements

92, 92’‧‧‧ rays

33‧‧‧Photosensitive elements

93, 93’‧‧‧ rays

4‧‧‧Light guiding elements

L ₁ , L ₁ '‧‧‧ first optical axis

41‧‧‧Ontology

L ₂ , L ₂ '‧‧‧ second optical axis

42‧‧‧ inner surface

L ₃ , L ₃ '‧‧‧ first normal

43‧‧‧ outer surface

L ₄ , L ₄ '‧‧‧ second normal

44‧‧‧Intra-light department

θ ₁ , θ ₁ '‧‧‧ first angle

45‧‧‧Inside Light Guide

θ ₂ , θ ₂ '‧‧‧ second angle

451‧‧‧second bevel

θ ₃ ‧‧‧ third angle

452‧‧‧ third slope

46‧‧‧External Light Department

The other features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the drawings, wherein: FIG. 1 is a schematic diagram illustrating a first preferred embodiment of the present optical mouse; FIG. Is a schematic view showing an embodiment of a light guiding device of the first preferred embodiment; FIG. 3 is a schematic view showing a second preferred embodiment of the optical mouse of the present invention; and FIG. 4 is a schematic view illustrating An embodiment of a light guiding element of the second preferred embodiment.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figures 1 and 2, a first preferred embodiment of the optical mouse 100 of the present invention is shown. The optical mouse 100 can be used by a user on a working surface 91 and includes a housing 1 and a light sensing module 2.

The housing 1 is movably placed on the work surface 9 and defines an opening 11 adjacent the working surface 91 on the bottom surface thereof.

The light sensing module 2 is disposed in the housing 1 and emits light 92 that is incident on the working surface 91 and receives the light 93 reflected by the working surface 9 to cooperate with the control circuit of the optical mouse 100 (not drawn in the figure). The displacement direction and the displacement amount of the optical mouse 100 on the working surface 91 are determined and correspondingly presented on the display index of the display screen.

The optical sensing module 2 includes an optical transceiver unit 3 and a light guiding component 4 corresponding to each other in the vertical direction.

The optical transceiver unit 3 has a circuit board 31, a light-emitting element 32 and a light-receiving element 33. The circuit board 31 has a lower surface 311. The light-emitting element 32 is disposed adjacent to the photosensitive element 33 on the lower surface 311 of the circuit board 31.

In this embodiment, the light-emitting element 32 is a vertical-cavity surface-emitting laser (VCSEL), which can emit laser light required for the optical mouse 100 to move and position. The photosensitive element 33 is a complementary CMOS pixel-array sensor capable of receiving light emitted by the light-emitting element 32, conducted by the light-guiding element 4 and reflected by the working surface 91, and by the pixel thereof. The array senses the corresponding image signal. However, the semiconductor elements used in the light-emitting element 32 and the light-receiving element 33 may be adjusted correspondingly as needed. For example, the light-emitting element 32 may also be a light-emitting diode (LED), and thus is not limited to the contents disclosed herein.

The light guiding element 4 is made of a light transmissive plastic material through an injection molding technique and has a body 41. The body 41 of the light guiding element 4 is vertically disposed between the optical transceiver unit 3 and the working surface 91, and has the opposite An inner surface 42 and an outer surface 43 have an inner surface 42 adjacent the lower surface 311 of the circuit board 31, and an outer surface 43 adjacent the working surface 91 and parallel to the inner surface 42. In this embodiment, the inner surface 42 of the body 41 forms an inner light collecting portion 44 corresponding to the position of the light emitting element 32 and an inner light guiding portion 45 corresponding to the position of the photosensitive element 33, and the outer surface 43 of the body 41 forms a The outer light collecting portion 46 corresponding to the position of the inner light guiding portion 45 and the pair of outer light guiding portions 47 at the position of the inner light collecting portion 44.

Here, the inner light collecting portion 44 and the outer light collecting portion 46 are each a convex lens. The outer light guiding portion 47 is substantially cylindrical and protrudes toward the working surface 91, and has a circumferential surface 471 and a first inclined surface 472 that closes the circumferential surface 471. The first slope 472 extends obliquely in a direction toward the outer concentrating portion 46 toward the adjacent work surface 91. On the other hand, the inner light guiding portion 45 is convex toward the circuit board 31 and has a right-angled triangular cross section and has a second inclined surface 451. The second slope 451 extends obliquely in a direction toward the inner concentrating portion 44 toward the adjacent circuit board 31.

Further defining a first optical axis L1 of the inner light collecting portion 44, a second optical axis L2 of the outer light collecting portion 46, a first normal line L3 of the first inclined surface 472 of the vertical outer light guiding portion 47, and a vertical The second normal line L4 of the second inclined surface 451 of the inner light guiding portion 45 passes through the outer light guiding portion 47 and the light emitting element 32, and the second optical axis L2 passes through the inner light guiding portion 45. .

According to the above design, the laser beam 92 emitted by the light-emitting element 32 can be regarded as substantially perpendicular to the inner light collecting portion 44, and is concentrated by the lens of the inner light collecting portion 44 into parallel light, and is in the body 41 of the light guiding element 4. It is transmitted vertically downward to the outer light guiding portion 47. At the first slope 472 of the outer light guiding portion 47, The light 92 penetrates from the light guide member 4 of the plastic material into the air to cause refraction, and due to the oblique direction of the first slope 472, the light ray 92 reflects the first slope 472, and is the outward light guide portion 47 and the outer light collecting portion. The direction between 46 is incident on the work surface 91.

Subsequently, the light ray 93 reflected by the working surface 91 is at least partially concentrated by the outer concentrating portion 46, and is transmitted substantially vertically upward in the body 41 of the light guiding element 4 to the inner light guiding portion 45, and then according to the inner guiding light. The second inclined surface 451 of the portion 45 is inclined in the direction in which the light ray 93 is turned inward in the direction between the inner light guiding portion 45 and the inner light collecting portion 44, and is finally irradiated onto the photosensitive member 33.

In the above process, after the light ray 92 emitted from the light-emitting element 32 is incident on the light-guiding element 4 by the inner concentrating portion 44, it is substantially parallel light and travels substantially in the direction of the first optical axis L1, so that the light ray 92 is incident on the outside. The incident angle of the first inclined surface 472 of the light guiding portion 47 can be regarded as equivalent to the first angle θ ₁ between the first optical axis L1 and the first normal line L3 (ie, the incident angle of the light beam 92 on the first inclined surface 472 is equal to The first angle θ ₁ ). Since the material of the light guiding element 4 is a plastic material (assuming a refractive index of 1.5), according to Snell's law, it is ensured that the light 92 can be smoothly incident from the light guiding element 4 into the air (refractive index is 1). The first angle θ ₁ must be less than 41.8 degrees without total reflection. In the embodiment of the present invention, the preferred range of the first angle θ ₁ is 30 degrees to 39 degrees. This design can effectively control the direction of refraction of the light 92 to ensure the light sensing module. 2 optical quality.

On the other hand, the light 93 reflected by the working surface 91 is concentrated by the external light collecting portion 46 and enters the light guiding element 4, and travels substantially in the direction of the second optical axis L2. Therefore, the light 93 is incident on the inner light guiding portion 45. The incident angle of the second inclined surface 451 can be regarded as substantially equal to the second included angle θ ₂ between the second optical axis L2 and the second normal line L4 (ie, the incident angle of the light ray 93 on the second inclined surface 451 is equal to the second angle) θ ₂ ). Similar to the first angle θ ₁ , the condition that the ray 93 does not cause total reflection at the second slope 451 is that the second angle θ ₂ must be less than 41.8 degrees. In addition, in addition to controlling the second angle θ ₂ to avoid total reflection of the light ray 93, the optical mouse 100 of the present invention can also adjust the direction of advancement of the light ray 93 by the tilt direction and angle of the second slope 451 of the inner light guiding portion 45. The elasticity of the photosensitive member 33 at the position where the circuit board 31 is placed is improved.

Specifically, since the tilting direction of the second inclined surface 451 of the inner light guiding portion 45 can control the traveling direction of the light ray 93, the technical solution proposed by the present invention can adjust the setting position of the photosensitive element 33 on the circuit board 31 as needed (for example, The photosensitive element 33 is disposed closer to the light-emitting element 32 to reduce the planar area occupied by the photosensitive element 33 and the light-emitting element 32, and the tilt direction and the tilt angle of the second slope 451 are adjusted according to the position of the photosensitive element 33. The light ray 93 can be surely received by the photosensitive element 33. In the present embodiment, the preferred range of the second included angle θ ₂ is 10 degrees to 20 degrees. This design can effectively control the advancing direction of the light ray 93 after being refracted from the second inclined surface 451, and ensure the sensing effect of the photosensitive element 33.

However, it should be particularly noted that the above numerical ranges regarding the first angle θ ₁ and the second angle θ ₂ are only used to illustrate the implementation of the present invention, but should not limit the scope of implementation of the present invention, as long as the above description is met. The design of the content is the scope of the implementation of this new model.

Referring to Figures 3 and 4, a second preferred embodiment of the optical mouse 100 of the present invention is shown. The second preferred embodiment is substantially identical to the first preferred embodiment Also, the difference is that the configuration and operation mechanism of the outer light guiding portion 48 in the second embodiment is different from that of the outer light guiding portion 47 in the first embodiment.

Specifically, in the second embodiment, the outer light guiding portion 48 has a substantially triangular cross section and protrudes toward the working surface 91, and has a first inclined surface 481 and a second inclined surface 482 connected thereto. The first inclined surface 481 is gradually inclined to extend away from the working surface 91 in a direction away from the outer light collecting portion 46, and the second inclined surface 482 is interposed between the first inclined surface 481 and the outer collecting portion 46, and is oriented The direction of the outer concentrating portion 46 gradually extends obliquely away from the working surface 91. On the other hand, the inner light guiding portion 45 protrudes toward the circuit board 31 and has a right-angled triangular cross section, and has a third inclined surface 452 which is directed to the adjacent circuit board 31 in the direction toward the inner light collecting portion 44. The direction gradually extends obliquely.

Here, the definition of a second preferred embodiment, a first optical axis of the converging portion 44 of the L ₁ ', the second optical axis converging portion 46 of the outer L _2', perpendicular to the light portion of the outer conductor 48 of the first a first inclined surface 481 normal L ₃ 'and the perpendicular to the light guide portion 45 of the third inclined surface 452 of the second normal line L _4'. The first optical axis L ₁ ' passes through the outer light guiding portion 48 and the light emitting element 32, and the second optical axis L ₂ ' passes through the inner light guiding portion 45. The first angle θ ₁ ' between the first optical axis L ₁ ′ and the first normal line L ₃ ′ in the embodiment is 60 degrees, and the second angle θ ₂ between the first inclined surface 481 and the second inclined surface 482 is ₂ ' is 60 degrees, and the third angle θ ₃ between the second optical axis L ₂ ' and the second normal line L ₄ ' is 10 degrees to 20 degrees.

According to the above design, when the light ray 92' is incident on the first inclined surface 481 along the first optical axis L ₁ ', the incident angle (the first included angle θ ₁ ') is 60 degrees, which is larger than the critical angle of total reflection (assumed to be 41.8). Therefore, the light ray 92 generates total reflection at a first angle 481 at a reflection angle of 60 degrees, and passes through the second slope 482 in a normal incidence to illuminate the work surface 91. Subsequently, the light ray 93' reflected by the working surface 91 is incident on the third inclined surface 452 of the inner light guiding portion 45 substantially along the second optical axis L ₂ ', and is irradiated to the photosensitive member 33 at a predetermined refractive angle.

Therefore, according to the above manner, the second embodiment of the present invention can also control the direction in which the light rays 92', 93' are turned forward through the inner light guiding portion 45 and the outer light guiding portion 48, thereby implementing the optical mouse 100 of the present invention. Light path design. However, it should be noted that the angular range of the first angle θ ₁ ', the second angle θ ₂ ′, and the third angle θ ₃ may be designed as needed, as long as the light travels according to the above mechanism, instead of The content disclosed here is limited.

In summary, with the structure and light-conducting design of the light guiding element 4 proposed by the present invention, the light-emitting element 32 and the photosensitive element 33 can be disposed on the same surface of the circuit board 31 (ie, the lower surface 311), without the need to follow the tradition. The design of the light-emitting element 32 on the side of the light-guiding element 4 can effectively reduce the planar area of the light-sensing module 2 and realize the miniaturization design of the optical mouse 100. In addition, since the light-emitting element 32 and the light-receiving element 33 can be directly mounted on the circuit board 31 to form the modular optical transceiver unit 3, assembly of the individual components in the housing 1 of the optical mouse 100 is not required. The program, which is designed to effectively simplify the production process of the optical mouse 100, facilitates the mass production of the optical mouse 100.

However, the above is only the preferred embodiment of the present invention, and when it is not possible to limit the scope of the implementation of the present invention, The simple equivalent changes and modifications made by the scope of patents and the contents of the patent specifications are still within the scope of this new patent.

100‧‧‧ optical mouse

41‧‧‧Ontology

1‧‧‧shell

42‧‧‧ inner surface

11‧‧‧ openings

43‧‧‧ outer surface

2‧‧‧Light sensing module

44‧‧‧Intra-light department

3‧‧‧Optical transceiver unit

45‧‧‧Inside Light Guide

31‧‧‧ boards

46‧‧‧External Light Department

311‧‧‧ lower surface

47‧‧‧External Light Guide

32‧‧‧Lighting elements

91‧‧‧Working face

33‧‧‧Photosensitive elements

92, 93‧‧‧ rays

4‧‧‧Light guiding elements

Claims (12)

A light guiding component is disposed in a housing and is used in conjunction with an optical transceiver unit disposed in the housing, the housing being movably disposed on a working surface and having an opening adjacent to the working surface, The optical transceiver unit includes a circuit board, a light-emitting component, and a light-sensing component. The circuit board has a lower surface. The light-emitting component is disposed adjacent to the photosensitive component on a lower surface of the circuit board. The light-guiding component comprises: a body. The light transmissive unit is interposed between the optical transceiver unit and the working surface, and has an opposite inner surface and an outer surface adjacent to a lower surface of the circuit board, the outer surface being adjacent to the working surface, The inner surface of the body forms a pair of inner light collecting portions corresponding to the positions of the light emitting elements and a pair of inner light guiding portions for the positions of the photosensitive elements, and the outer surface of the body forms a pair of outer light guiding portions for the position of the inner collecting portion and a An external light collecting portion corresponding to the position of the inner light guiding portion, wherein the light emitted by the light emitting element is concentrated and transmitted by the inner light collecting portion to the outer light guiding portion, and the outer light guiding portion is turned through the opening of the housing And photo To the working surface, the working surface of the light reflected by the opening of the outer housing by the convergence of the converging portion and transmitted to the light guide portion, and then by turning the irradiation of the light guide portion to the photosensitive member. The light guiding device of claim 1, wherein the inner light collecting portion and the outer light collecting portion are each a convex lens; the outer light guiding portion is substantially columnar and protrudes toward the working surface, and has a one-sided surface And a first inclined surface that closes the circumferential surface, the first inclined surface gradually obliquely extends in a direction toward the outer concentrating portion toward a direction adjacent to the working surface; the inner light guiding portion protrudes toward the circuit board and has a cross section The utility model has a substantially right-angled triangle and has a second inclined surface which gradually extends obliquely in a direction toward the inner concentrating portion toward a direction adjacent to the circuit board. The light guiding device of claim 2, wherein a first optical axis of the inner collecting portion, a second optical axis of the outer collecting portion, and a first inclined surface perpendicular to the outer guiding portion are defined. a first normal line and a second normal line perpendicular to the second slope of the inner light guiding portion, the first optical axis passes through the outer light guiding portion and the light emitting element, and the second optical axis passes through the inner The light guiding portion has an angle between the first optical axis and the first normal line ranging from 30 degrees to 39 degrees, and an angle between the second optical axis and the second normal line ranges from 10 degrees to 20 degrees. The light guiding component of claim 1, wherein the inner light collecting portion and the outer light collecting portion are each a convex lens; the outer light guiding portion protrudes toward the working surface and has a regular triangular cross section and is connected a first inclined surface and a second inclined surface, the first inclined surface gradually extending obliquely away from the working surface in a direction away from the outer concentrating portion, the second inclined surface being between the first inclined surface and the external condensed light And extending in a direction away from the working surface in a direction toward the outer concentrating portion; the inner light guiding portion protrudes toward the circuit board and has a right-angled triangular cross section and a third inclined surface The third inclined surface gradually extends obliquely in a direction toward the inner concentrating portion toward a direction adjacent to the circuit board. The light guiding device of claim 4, wherein a first optical axis of the inner collecting portion, a second optical axis of the outer collecting portion, and a first inclined surface perpendicular to the outer guiding portion are defined. a first normal line and a second normal line perpendicular to the third slope of the inner light guiding portion, the first optical axis passing through the outer light guiding portion and the hair The light element, the second optical axis passes through the inner light guiding portion, the angle between the first optical axis and the first normal line is 60 degrees, and the angle between the second optical axis and the second normal line is 10 degrees to 20 degrees. A light sensing module is disposed in a casing and movably used on a working surface, the casing has an opening adjacent to the working surface, and the light sensing module comprises: an optical transceiver unit, including a circuit board, a light-emitting component and a light-sensing component, the circuit board having a lower surface, the light-emitting component is disposed adjacent to the photosensitive component on a lower surface of the circuit board; and a light-guiding component having a body, the light guide The body of the component is permeable to light and interposed between the optical transceiver unit and the work surface, and has an opposite inner surface and an outer surface adjacent to a lower surface of the circuit board, the outer surface being adjacent to the work The inner surface of the body forms a pair of inner light collecting portions corresponding to the position of the light emitting element and a pair of inner light guiding portions for the position of the photosensitive member, and the outer surface of the body forms a pair of outer light guiding portions at the position of the inner collecting portion And a pair of outer light collecting portions of the inner light guiding portion, wherein the light emitted by the light emitting element is concentrated and transmitted by the inner light collecting portion to the outer light guiding portion, and the outer light guiding portion is turned through the shell Body opening To the working surface, the working surface of the light reflected by the opening of the outer housing by the convergence of the converging portion and transmitted to the light guide portion, and then by turning the irradiation of the light guide portion to the photosensitive member. The light sensing module of claim 6, wherein the inner light collecting portion and the outer light collecting portion are each a convex lens; the outer light guiding portion is substantially columnar and protrudes toward the working surface, and has a week and a first slope that closes the circumference, The first inclined surface gradually extends obliquely in a direction toward the outer concentrating portion toward a direction adjacent to the working surface; the inner light guiding portion protrudes toward the circuit board and has a right-angled triangular cross section and has a second inclined surface. The second inclined surface gradually extends obliquely in a direction toward the inner concentrating portion toward a direction adjacent to the circuit board. The light sensing module of claim 7, wherein a first optical axis of the inner light collecting portion, a second optical axis of the outer light collecting portion, and a first vertical light guiding portion are defined. a first normal line of the inclined surface and a second normal line perpendicular to the second inclined surface of the inner light guiding portion, the first optical axis passes through the outer light guiding portion and the light emitting element, and the second optical axis passes through In the inner light guiding portion, the angle between the first optical axis and the first normal line ranges from 30 degrees to 39 degrees, and the angle between the second optical axis and the second normal line ranges from 10 degrees to 20 degrees. The light sensing module of claim 6, wherein the inner light collecting portion and the outer light collecting portion are each a convex lens; the outer light guiding portion has an equilateral triangle and protrudes toward the working surface, and Having a first inclined surface and a second inclined surface, the first inclined surface gradually extending obliquely away from the working surface in a direction away from the outer concentrating portion, the second inclined surface being between the first inclined surface and the first inclined surface Between the outer concentrating portions and in a direction toward the outer concentrating portion, the illuminating portion is gradually inclined to extend away from the working surface; the inner guiding portion protrudes toward the circuit board and has a right-angled triangular cross section and has a a third inclined surface that gradually extends obliquely in a direction toward the inner concentrating portion toward a direction adjacent to the circuit board. The light sensing module of claim 9, wherein a first optical axis of the inner collecting portion, a second optical axis of the outer collecting portion, and a vertical axis are defined. a first normal line of the first inclined surface of the light guiding portion and a second normal line perpendicular to the third inclined surface of the inner light guiding portion, the first optical axis passing through the outer light guiding portion and the light emitting element, the first The two optical axes pass through the inner light guiding portion, the angle between the first optical axis and the first normal line is 60 degrees, and the angle between the second optical axis and the second normal line ranges from 10 degrees to 20 degrees. . The light sensing module of claim 6, wherein the light emitting element is a vertical cavity surface type laser or a light emitting diode, and the photosensitive element is a complementary gold oxide half pixel array sensor. An optical mouse for use on a work surface, comprising: a housing movably disposed on the work surface and having an opening adjacent to the work surface; and as claimed in items 6 to 11 A light sensing module is disposed in the housing corresponding to the opening thereof.