CN214252690U - Lens holder for optical module and optical module - Google Patents

Abstract

The utility model relates to a lens seat for an optical module and the optical module, the lens seat comprises an elastic piece, an elastic butt base, a fixed butt piece and a lens, and the front surface of the elastic butt base is provided with a containing groove; the elastic piece is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base; the lens is accommodated between the back surface of the elastic abutting base and the fixed abutting sheet. This lens seat one side is through fixed butt piece and external rigid coupling, and the opposite side passes through the setting of elastic component and external rigid coupling, has realized the fastening setting of the lens group among the optical module, is different from the screw-thread fit fastening mode among the prior art, and then in the environment of the frequent vibrations of optical module, also difficult slip skew has guaranteed the collimation of light path, easy dismounting simultaneously.

Description

Lens holder for optical module and optical module

Technical Field

The present invention relates to an optical module, and more particularly to a lens holder and an optical module for use in laser inspection.

Background

In recent years, laser machining has been used by more and more machining enterprises and has become a standard method in manufacturing workpieces. The laser processing is to utilize a laser beam excited by a laser to transmit through an optical fiber and a lens and then focus a heat source to enable a material to be rapidly heated and to cause melting (even gasification), thereby achieving the purpose of material processing. Since the laser processing process is a highly coupled process, there are many factors that affect the laser processing quality. For example: the laser welding method is limited by various factors, so that the welding defects of sinking, splashing, flanging and humping appear in the welding area of the workpiece. This places a great constraint on product quality and efficiency.

For this reason, a series of techniques for quality inspection of laser processing processes by means of optical radiation signal characteristics have been developed nowadays for laser processing defects. In the related technology, an optical radiation signal generated during laser processing is guided into a detection device through a guide optical element of a laser processing head, and the optical radiation signal is divided into a plurality of paths through a spectroscope and is respectively output to a CCD photosensitive sensor. Since not all optical radiation signals are beneficial to quality detection, in order to acquire optical radiation signals of specific spectrums, such as laser reflection signals and infrared light radiation signals, a band-pass filter is further arranged in a corresponding optical detection light path to filter useless optical radiation signals.

In the existing quality detection device, such as chinese patent CN 201920823152-on-line detection device for laser welding quality with adjustable light intensity, an optical device is generally clamped between two devices that are sleeved with each other, and the two sleeved devices are generally fastened into a whole through screw-thread fit. The inventor finds that the firmware of the traditional clamping optical device is easy to loosen when the detection module vibrates, and particularly, the firmware is subjected to vibration of the detection module to cause internal optical path deviation in long-time work so as to influence detection performance.

Because the laser processing method has high requirements on optical path calibration, the quality detection device needs relatively accurate optical path calibration during installation, and filter plate groups and the like need to be disassembled and assembled during calibration. The inventor finds that the existing optical device module, such as a rotary thread fixing structure, can not be directly plugged into the optical module, and the disassembly and the assembly are more complicated.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a lens seat and optical module for optical module, the technical scheme that this application adopted for realizing above-mentioned purpose is:

a lens seat for an optical module comprises an elastic piece, an elastic abutting base, a fixed abutting piece and a lens; the front surface of the elastic abutting base is provided with an accommodating groove; the elastic piece is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base; the lens is accommodated between the back surface of the elastic abutting base and the fixed abutting sheet.

Preferably, the elastic abutting base is provided with 4 accommodating grooves, the number of the elastic pieces is 4, and the elastic pieces are correspondingly arranged in the accommodating grooves one by one.

Preferably, the elastic member is one or more of rubber, an elastic ball or a spring.

Preferably, the lens is one or more of a reflector, a transflective lens, a convex lens, a concave lens, a filter or a light attenuation sheet.

Preferably, the outer surface of the fixed abutting sheet is a frosted surface.

An optical module comprises an upper cover, a lens seat and a lower cover; the upper cover is integrally formed and is provided with a slot; the lens seat is detachably inserted in the upper cover through the slot; the lower cover is fixedly connected with the upper cover, and the middle part of the lower cover is used for accommodating the lens seat; the lens seat comprises an elastic piece, an elastic abutting base, a fixed abutting piece and a lens; the front surface of the elastic abutting base is provided with an accommodating groove; the elastic piece is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base; the lens is accommodated between the back surface of the elastic abutting base and the fixed abutting sheet.

Preferably, the slot on the integrally formed upper cover is provided with a processing reference surface and an abutting surface; the fixed abutting sheet is tightly attached to the processing reference surface, and the front surface of the elastic abutting base is elastically abutted on the abutting surface through a protruding elastic piece; the lens seat is pressed in the slot of the upper cover through the elastic piece.

Preferably, the abutting part of the slot is also provided with an anti-skid groove.

Preferably, the lens is one or more of a reflector, a transflective lens, a convex lens, a concave lens, a filter or a light attenuation sheet.

Preferably, the optical module further comprises an optical attenuation sheet and a photoelectric sensor; the lens seat is used for receiving the detection light beam; the upper cover is fixedly provided with a lens seat, a light attenuation sheet and a photoelectric sensor in sequence in the emergent direction of the detection light beam; the light attenuation sheet is used for reducing the light intensity of emergent light of the lens seat; the photoelectric sensor is used for receiving emergent light of the light attenuation sheet and outputting a detection electric signal after photoelectric conversion.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the lens seat can be dismantled and insert in optical module's integrated into one piece's upper cover in this application, and the one side of lens seat is through the processing reference surface that fixed butt piece closely pasted the upper cover slot, and the another side is through the elasticity butt base elasticity butt that has the elastic component on the butt face of upper cover. Different from the screw-thread fit fastening mode in the prior art, the optical module is not easy to slide and shift in the environment of frequent vibration, and the collimation of the optical path is ensured.

(2) The lens base is different from the existing optical device module mounting mode, such as a rotary thread mounting mode and the like, but can be detachably inserted into the integrally formed optical module, so that the lens base is convenient to disassemble and assemble.

Drawings

Fig. 1 is a perspective view of a lens holder product of example 1.

Fig. 2 is an exploded view of the lens holder of fig. 1.

Fig. 3 is a side view of a lens holder product of example 4.

Fig. 4 is an exploded view of the lens holder of fig. 3.

Fig. 5 is a cross-sectional view of a side view of the lens holder product of fig. 3.

Fig. 6 is an exploded view of fig. 5.

Fig. 7 is a perspective view of a lens carrier product of example 1.

Fig. 8 is an exploded view of fig. 7.

Fig. 9 is a side view of a lens carrier product of example 1.

Fig. 10 is an exploded view of fig. 9.

Fig. 11 is a cross-sectional view of a lens carrier product of example 1.

Fig. 12 is an exploded view of fig. 11.

Fig. 13 is a cross-sectional view of an optical module including a laser processing head.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Terms such as "inner", "outer", "front", "back", and the like, used herein to denote relative spatial positions, are used for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims.

Example 1: the lens holder 10 shown in fig. 1-13 comprises an elastic member 11, an elastic abutment base 12, a fixed abutment piece 14 and a lens 13; the front surface of the elastic abutting base 12 is provided with a containing groove; the elastic piece 11 is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base 12; the lens 13 is accommodated between the back surface of the elastic abutting base 12 and the fixed abutting piece 14. The elastic abutting base 12 is provided with 4 accommodating grooves, the number of the elastic pieces 11 is 4, and the elastic pieces 11 are correspondingly arranged in the accommodating grooves one by one. It can be understood that, in some embodiments, a required number of receiving grooves may be disposed at selected positions according to practical application requirements to receive the elastic member.

Furthermore, in the structure of the lens holder 10 disclosed in the present application, the lens 13 is clamped between the back surface of the elastic abutting base 12 and the fixed abutting sheet 14, the clamping force is provided by the elastic member 11 on one side, and the fixed abutting sheet on the other side is tightly attached to the processing reference surface 121 of the slot 120 on the upper cover 110 for being conveniently installed in the optical module. Thus, the accuracy of the subsequent lens base 10 installation is ensured, and the subsequent lens base 10 is convenient to install in the integrally formed upper cover slot.

Example 2: in some embodiments, the resilient member 11 may be one or more of rubber, resilient balls, or springs, such as resilient balls.

Example 3: in some embodiments, when the lens 13 is a transflective lens, the lens holder 10 composed of the elastic member 11, the elastic abutting base 12, the fixed abutting piece 14 and the transflective lens is a spectroscope lens holder 10 a; when the lens 13 is a filter, the lens holder 10 composed of the elastic member 11, the elastic contact base 12, the fixed contact piece 14 and the filter is a filter holder 10 b. The outer surface of the combiner lens holder 10a and/or the filter lens holder 10b, i.e., the outer surface of the fixed abutting piece 14, is a frosted surface for increasing the fastening friction force between the fixed abutting piece 14 and the structure for accommodating the fixed abutting piece 14.

Example 4: as shown in fig. 3 to 6, unlike embodiment 3, the mirror 13 is a convex lens.

Example 5: the embodiment of the present application provides an optical module 100, which includes an upper cover 110, a lens holder 10, and a lower cover; the upper cover 110 is integrally formed and formed with a slot 120; the lens holder 10 is detachably inserted into the upper cover 110 through the insertion slot 120; the lower cover is fixedly connected with the upper cover 110, and the middle part of the lower cover is used for accommodating the lens base 10; the lens seat 10 comprises an elastic piece 11, an elastic abutting base 12, a fixed abutting piece 14 and a lens 13; the front surface of the elastic abutting base 12 is provided with a containing groove; the elastic piece 11 is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base 12; a lens 13 is accommodated between the back surface of the elastic abutting base 12 and the fixed abutting sheet 14; the elastic abutment base 12 is as shown in embodiment 1; the elastic member 11 is as shown in example 2; the outer surface of the fixed abutment plate 14 is a frosted surface. It can be understood that, in this embodiment, the lens seat 10 is disposed in the integrally formed slot 120, and then the lens 13 is sandwiched between the back surface of the elastic abutting base 12 and the fixed abutting sheet 14, the sandwiching force is provided by the elastic member 11 on one side, and the fixed abutting sheet on the other side is tightly attached to the processing reference surface 121 of the slot 120 on the upper cover 110 to be conveniently installed in the optical module, so that the accuracy of the subsequent lens seat installation is ensured, and the subsequent lens seat installation in the integrally formed upper cover slot is facilitated.

Example 6: referring to fig. 13, in some embodiments, the slot 120 of the integrally formed upper cover 110 has a processing reference surface 121 and an abutting surface 122; the fixed contact piece 14 is closely attached to the processing reference surface 121, and the front surface of the elastic contact base 12 is elastically contacted with the contact surface 122 through the protruding elastic piece 11; the lens holder 10 is pressed into the upper cover insertion groove 120 by the elastic member 11. In the embodiment of the present application, by setting the processing reference surface 121, the lens holder 10 can ensure that the precision of one processing surface can meet the requirement of the high-precision optical precision effect, and further, the integrated upper cover 110 or the upper cover slot 120 is combined to obtain the high-precision optical detection result. Further, in order to avoid the influence of the vibration of the optical module 100 on the accuracy of the internal optical path during the production process, the elastic member 11 is elastically abutted against the abutting surface 122 in the embodiment of the present application, and the structural design of the anti-slip groove 130 is further provided at the abutting position of the insertion groove 120, so that the stability of the internal optical structure of the lens holder 10 is further improved.

Example 7: referring to fig. 13, it can be understood that, when the lens 13 in the optical detection module 100 in embodiment 4 is the transflective lens and the filter in embodiment 3, the optical module 100 includes an upper cover 110, a dichroic mirror holder 10a, a filter lens holder 10b and a lower cover (not shown in the figure); the upper cover 110 is integrally formed and formed with a spectroscope lens insertion groove 120a and a filter lens insertion groove 120 b; the spectroscope lens seat 10a and the filter lens seat 10b are detachably inserted into the upper cover 110 through a spectroscope lens slot 120a and a filter lens slot 120b, respectively; the spectroscope lens seat 10a and the filter lens seat 10b are arranged in sequence in the incident direction of the detection light beam; the lower cover is fixedly connected with the upper cover 110. The spectroscope lens seat 10a is used for receiving the detection light beam and dividing the detection light beam into at least two emergent light beams with different frequency bands; the filter lens holder 10b is used to better obtain different transmission light band selections in the direction of the detection light beam.

Example 8: referring to fig. 13, unlike embodiment 7, the optical module 100 does not include the filter lens set 10 b.

Example 9: referring to fig. 13, unlike embodiment 7, the optical module 100 further includes a light attenuation sheet 140 and a photosensor 150; the upper cover 110 is fixedly provided with a spectroscope lens seat 10a, an optical filter lens group 10b, a light attenuation sheet 140 and a photoelectric sensor 150 in sequence in the outgoing direction of the detection light beam; the light attenuation sheet 140 is used for reducing the light intensity of emergent light of the spectroscope lens seat 10 a; the photosensor 150 is configured to receive light emitted from the optical attenuator 140 and output a detection electrical signal after photoelectric conversion.

Therefore, when the optical module 100 is used as an actual product, the optical radiation signal enters the optical module 100, the first spectroscope lens seat 10a divides the signal beam into two parts of optical radiation signals, wherein one part of the optical radiation signals is transmitted to the second spectroscope lens group 10 a; the other part is vertically turned to the first filter lens group 10b through reflection, and after optical signals of a certain wave band are selected through the first filter lens group 10b, the light intensity is adjusted through the light attenuation sheet 140, and then the optical signals enter the optical sensor 150, so that photoelectric signal conversion is realized.

Example 10: referring to fig. 13, in an implementation manner, the optical module 100 provided in the embodiment of the present application further includes a laser processing head 1 disposed on a side surface, the laser processing head 1 is installed in cooperation with the optical detection module 100, and a detection beam obtained by the side surface of the laser processing head 1 may be radiated onto the spectroscope lens holder 10a through an inlet of the optical detection module 100, so as to receive a light radiation signal that the detection beam is split from a processing light path of the laser processing head. Furthermore, in the integrated optical module 100 of the present embodiment, the laser processing head, the laser processing light splitting path structure, and the laser processing detection structure are all fixedly connected together. The detection precision and stability of the optical module are improved.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (10)

1. A lens seat for an optical module is characterized by comprising an elastic piece, an elastic abutting base, a fixed abutting piece and a lens; the front surface of the elastic abutting base is provided with an accommodating groove; the elastic piece is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base; the lens is accommodated between the back surface of the elastic abutting base and the fixed abutting sheet.

2. The lens holder according to claim 1, wherein the elastic abutment base has 4 receiving grooves, and the number of the elastic members is 4, and the elastic members are correspondingly mounted in the receiving grooves.

3. The lens holder according to claim 1, wherein the resilient member is one or more of rubber, a resilient ball or a spring.

4. The lens holder of claim 1, wherein the lens is one or more of a mirror, a transflective lens, a convex lens, a concave lens, a filter, or a light attenuating plate.

5. The lens holder of claim 1, wherein the outer surface of the fixed abutment tab is frosted.

6. An optical module comprises an upper cover, a lens seat and a lower cover; it is characterized in that the upper cover is provided with an integrally formed slot; the lens seat is detachably inserted in the upper cover through the slot; the lower cover is fixedly connected with the upper cover, and the middle part of the lower cover is used for accommodating the lens seat; the lens seat comprises an elastic piece, an elastic abutting base, a fixed abutting piece and a lens; the front surface of the elastic abutting base is provided with an accommodating groove; the elastic piece is embedded in the containing groove and protrudes out of the front surface of the elastic abutting base; the lens is accommodated between the back surface of the elastic abutting base and the fixed abutting sheet.

7. The optical module of claim 6, wherein the slot integrally formed in the upper cover has a machining reference surface and an abutment surface; the fixed abutting sheet is tightly attached to the processing reference surface, and the front surface of the elastic abutting base is elastically abutted on the abutting surface through a protruding elastic piece; the lens seat is pressed in the slot of the upper cover through the elastic piece.

8. The optical module of claim 7, wherein the socket abutment is further provided with an anti-slip groove.

9. The optical module of claim 6 wherein the lens is one or more of a mirror, a transflective lens, a convex lens, a concave lens, a filter, or a light attenuating plate.

10. The optical module of claim 6, further comprising a light attenuating sheet and a photosensor; the lens seat is used for receiving the detection light beam; the upper cover is fixedly provided with a lens seat, a light attenuation sheet and a photoelectric sensor in sequence in the emergent direction of the detection light beam; the light attenuation sheet is used for reducing the light intensity of emergent light of the lens seat; the photoelectric sensor is used for receiving emergent light of the light attenuation sheet and outputting a detection electric signal after photoelectric conversion.

Images