CN219370055U

CN219370055U - Optical fiber collimation device with adjustable diaphragm

Info

Publication number: CN219370055U
Application number: CN202320619057.4U
Authority: CN
Inventors: 孙思华; 王瑜; 陆杨杨
Original assignee: Raintree Scientific Instruments Shanghai Corp
Current assignee: Raintree Scientific Instruments Shanghai Corp
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-07-18
Anticipated expiration: 2033-03-27

Abstract

The utility model relates to an optical fiber collimation device of an adjustable diaphragm, which comprises: the emergent end of the optical fiber seat is fixedly provided with a diaphragm; the incident end of the shaft barrel is fixed with the optical fiber seat; the lens bracket is sleeved on the shaft barrel; the shaft collar is screwed on the shaft barrel; one end of the limiting block is fixed on the lens bracket, and the other end of the limiting block is provided with a limiting part which is blocked in front of the incidence end of the shaft collar; the module support is fixed at the emergent end of the lens support and is used as a supporting foundation of the whole optical fiber collimating device. The compact structural design of the utility model realizes the axial adjustment of the optical fiber head and the diaphragm, and the module bracket is used as a supporting foundation of the whole optical fiber collimating device, does not participate in any movement, and has adjustable posture of the collimating mirror therein.

Description

Optical fiber collimation device with adjustable diaphragm

Technical Field

The utility model relates to an optical fiber collimation device with an adjustable diaphragm, and belongs to the technical field of optical fiber illumination.

Background

Optical devices often involve an active optical illumination imaging system, and fiber collimation is a central device of the active optical illumination system. The conventional optical lighting device sequentially comprises a light source, an optical fiber and a collimating lens according to the light passing sequence, and has the main functions of coupling the light source into the optical fiber, emitting light from the optical fiber, entering the collimating lens and restoring the light beam into a collimated light beam. The optical fiber replaces an expensive and complex reflecting mirror or a lens light path to transmit light beams, the structure is simpler, the light output of the optical fiber needs to quantitatively limit the throughput of the light beams, if a diaphragm is added at the light output end of the optical fiber, how to control the posture of the diaphragm and the light output direction of a collimating mirror is an important problem to be solved by an active optical illumination system, otherwise, the collimated light emitted by an optical fiber collimating device cannot accurately hit other optical elements.

The Chinese patent document with publication number CN209373226U discloses a light head position adjusting mechanism, which solves the axial displacement adjustment and angle adjustment of the optical fiber head relative to the lens. However, it does not solve the problem of radial offset of the light beam after the optical fiber emits light, how to control the size and direction of the field of view of the optical fiber emits light, and how to control the emitting direction of the lens collimated light.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows:

1) The problem of radial offset of the light beam after the optical fiber emits light is solved, so that the optical fiber and the diaphragm are adjustable in the axial direction, the radial direction and the axial direction (the axial refers to the optical axis), and the direction and the position of the light beam entering the collimating mirror are controllable;

2) The aperture is added, so that the size and the direction of the field of view of the light inlet of the collimating lens can be controlled;

3) The light emitting direction of the collimating mirror is adjustable.

The utility model adopts the following technical scheme:

an adjustable diaphragm fiber optic collimator comprising: the optical fiber seat 11, the exit end of which is fixedly provided with a diaphragm 19; a shaft tube 12, the incident end of which is fixed to the optical fiber seat 11; a lens holder 15 which is sleeved on the shaft barrel 12; a collar 13 screwed onto the shaft tube 12; a stopper 14 having one end fixed to the lens holder 15 and the other end provided with a stopper portion which is caught before the incident end of the collar 13; the module support 16 is fixed at the outgoing end of the lens support 15 and serves as a supporting base of the whole optical fiber collimating device.

The compact structural design of the scheme realizes the axial adjustability of the optical fiber head and the diaphragm, and the module support is used as a supporting foundation of the whole optical fiber collimating device and does not participate in any movement, and the posture of the collimating mirror in the module support is adjustable.

Preferably, the front end of the optical fiber seat 11 has a protruding portion that protrudes into the shaft barrel 12 and has a radial gap with the inner wall of the shaft barrel 12, the shaft barrel 12 is provided with a plurality of fine adjustment screws 18 that radially penetrate the wall of the shaft barrel 12, and the fine adjustment screws 18 can adjust the radial position of the optical fiber seat 11 when pushing the protruding portion inward, thereby adjusting the radial position of the diaphragm 19. The scheme realizes the radial position adjustment of the optical fiber head and the diaphragm.

Further, the circumference of the protruding portion is a conical surface with an incident end being a small end and an emergent end being a large end, and the fine adjustment screw 18 applies a component force to the optical fiber seat 11 in the axial direction when pressing the conical surface. The function of this scheme is when realizing that the radial position of optic fibre head, diaphragm is adjustable, can also provide the power that compresses tightly the assembly for additionally between light seat and the axle section of thick bamboo, plays the effect of double-end.

Preferably, it also comprises a guide pin 17; a plurality of notches are formed in the side wall of the shaft barrel 12, corresponding guide holes are formed in corresponding positions of the lens bracket 15, and the width of the notches is larger than the diameter of the guide nails 17; a guide pin 17 extends from the guide hole into the slot to radially limit and axially guide the shaft 12. The axial guiding and radial limiting functions between the residual lens brackets 15 of the shaft barrel 12 are realized, and the effect of achieving two purposes is achieved.

Further, the guide pins 17 lock the shaft 12 when pressing against the notches. This solution further achieves a locking function between the barrel 12 and the lens holder 15.

Preferably, an angle adjusting mechanism capable of adjusting the angle of the emergent light of the collimating mirror is arranged in the module support 16.

Preferably, the incident end of the optical fiber seat 11 is fixedly provided with an optical fiber head 10 through a clamping groove.

Further, the radial clearance is 0.5mm.

Preferably, the limiting block 14 has an L-shaped structure, and the bending portion thereof is blocked at the incident end of the collar 13.

Further, the trimming screws 18 have three, and adjacent trimming screws 18 are 120 ° apart.

The utility model has the beneficial effects that:

1) The built-in adjusting mechanism is adopted to carry out detailed structural design according to the actual use environment, so that the structure is more compact, and the number of parts is less.

2) Compared with the optical fiber, the optical fiber head is added with the diaphragm, so that the size, the position and the direction of an outgoing field of view are controllable, and the coupling efficiency of the optical fiber transmitting light entering the collimating mirror is improved;

3) The module support is used as a supporting base of the whole optical fiber collimating device and does not participate in any movement, so that a pitching top pulling mechanism can be arranged in the module support, and the angle of the whole structure part of the optical fiber, the diaphragm and the collimating mirror can be adjusted, so that the light emitting direction of the collimated light can be accurately controlled, the emergent collimated light can be favorably beaten to a required position, the precision requirement for processing parts can be properly reduced, and the corresponding processing cost can be reduced.

Drawings

Fig. 1 is a perspective view of an adjustable aperture fiber optic collimation device of the present utility model.

Fig. 2 is a detailed schematic diagram of the internal structure of the adjustable aperture fiber collimation device of the present utility model.

Fig. 3 is a schematic view of a diaphragm.

Fig. 4 is a cross-sectional view of an adjustable aperture fiber optic collimation device of the present utility model.

In the figure, 10 optical fiber heads, 11 optical fiber seats, 12 shaft barrels, 13 shaft rings, 14 limiting blocks, 15 lens supports, 16 module supports, 17 guide nails, 18 fine adjustment jackscrews, 19 diaphragms, 20 lenses and 191, and diaphragm light holes.

Detailed Description

The utility model will be further described with reference to the drawings and specific examples.

The utility model aims to provide an optical fiber collimating device with an adjustable diaphragm, which has a compact structure, simplified design and convenient adjustment, and aims to provide an optical fiber collimating device with an adjustable diaphragm, which uses an optical fiber to introduce a light source into a collimating mirror, and finally provides the optical fiber collimating device with the adjustable diaphragm, which is determined according to the actual installation environment.

In order to achieve the above objective, the optical fiber collimating device with adjustable aperture provided by the present utility model comprises an optical fiber head 10, an optical fiber seat 11, an aperture 19, a collar 13, a shaft barrel 12, a stopper 14, a lens bracket 15, a collimating mirror, a module bracket 16, a guide pin 17 and a fine adjustment jackscrew 18, as shown in fig. 1 and 2. The main mounting sequence is based on the propagation direction of the light, i.e. the left to right direction in the figure.

Firstly, the optical fiber seat 11 is provided with an optical fiber head mounting hole and a diaphragm clamping groove which are communicated in a penetrating way, the center of the end face of the diaphragm 19 is provided with a light passing hole 191 with a specific shape, the optical fiber head 10 is inserted into the incident end of the optical fiber seat 11, the diaphragm 19 is mounted at the emergent end of the optical fiber seat 11, and the fixing mode of the optical fiber head 10 and the diaphragm 19 is not limited; the outer circle of the emergent end of the optical fiber seat 11 is in clearance fit with the inner circle of the shaft cylinder, the single-side clearance is 0.5mm, the radial adjustment amount of the optical fiber head is realized, the outer circle of the shaft cylinder is provided with three radial penetrating screw holes, the holes penetrate into the fine adjustment jackscrews to realize the radial adjustment of the optical fiber head, and the fine adjustment jackscrews can take the radial adjustment and locking functions of the optical fiber seat into account because the outer circle of the emergent end of the optical fiber seat is an inclined plane; the rotating optical fiber seat can realize the circumferential view field adjustment of the diaphragm.

Secondly, the outer circle of the shaft barrel 12 and the inner circle of the lens bracket 15 are matched surfaces, and a guide pin groove and a guide pin screw hole are respectively formed between the two, and are used for inserting guide pins 17 to limit circumferential rotation at the matched surfaces; the inner circle of the outgoing end of the lens bracket 15 is provided with threads for installing a collimating lens; the outgoing end face of the lens support 15 is fixed with the incoming end face of the module support 16, a hole is formed in the middle of the module support 16 and used for enabling the lens to pass through the collimating lens in a non-contact mode, and an angle adjusting mechanism is arranged in the module support 16 and can achieve angle adjustment of outgoing light of the collimating lens.

Thirdly, the shaft collar 13 is in threaded connection with the excircle of the incident end of the shaft barrel 12, the incident end face of the shaft collar 13 is in clearance fit with the limiting block 14, the emergent end face is in contact with the incident end face of the lens bracket 15, the limiting block 14 is of an L-shaped structure, and the bending part of the limiting block 14 is blocked at the incident end of the shaft collar 13. The limiting block 14 is fixed on the side face of the lens bracket 15, and the rotary shaft collar 13 can realize axial movement of the optical fiber head 10.

When assembling, with reference to fig. 1 to 4, the whole installation sequence is assembled according to the light advancing direction:

s1, first, the optical fiber head 10 at one end of the outgoing light is inserted into the optical fiber seat 11, and the optical fiber seat 11 is fixed with the optical fiber head 10. The diaphragm 19 is fixed in the diaphragm clamping groove near the exit end of the optical fiber seat 11, and the adhesive dispensing or the screw thread pressing ring can be fixed.

S2, screwing the collar 13 into the matching thread of the shaft barrel 12, and particularly emphasizing the screwing direction from the incident end of the shaft barrel 12.

S3, inserting the excircle of the emergent end of the optical fiber seat 11 into the inner circle of the shaft barrel 12 to form a clearance fit kinematic pair, so as to ensure that the optical fiber seat 11 is inserted in place, namely the end face of the middle flange of the optical fiber seat 11 is attached to the end face of the incident end of the shaft barrel; three fine adjustment jackscrews 18 are screwed into threaded holes on the side face of the shaft cylinder, so that the fine adjustment jackscrews 18 are guaranteed to be screwed into place to be in contact with inclined planes of the excircle of the emergent end of the optical fiber seat, and the fine adjustment jackscrews 18 are locked.

S4, inserting the excircle of the emergent end of the shaft barrel into the inner circle of the lens support 16 to form a precise matching sliding kinematic pair, wherein the kinematic pair is used as a sliding rail for realizing movement of the optical fiber head 10 and the diaphragm 19 in the optical axis direction, the depth of the shaft barrel 12 inserted into the lens support 15 is aligned with the guide pin mounting holes as a reference, then the guide pin 17 is screwed into the corresponding threaded mounting hole of the lens support 15, the guide pin is screwed in too deeply, the shaft barrel is prevented from being pressed down, the guide pin 17 is ensured to extend into a sliding groove on the excircle side wall of the shaft barrel, and after the position adjustment of the diaphragm 19 is completed, the guide pin 17 is screwed in to press and fix the shaft barrel.

S5, fixing the limiting block 14 and the side face of the lens bracket 15 by screws, and ensuring that one end of the L-shaped limiting block is in clearance fit with the incident end face of the collar so as to provide supporting force for the collar when unscrewing.

S6, fixing the collimating lens on the outgoing end of the lens support in a threaded manner, so that all structures except the module support 16 are formed into a whole, connecting the flange surface of the outgoing end of the lens support 15 with the incident end surface of the module support 16 in a screwed manner, and driving the lens support to pitch and azimuth change through an angle adjusting device provided by the module support 16 to adjust the direction of outgoing light of the collimating lens.

The utility model is characterized in that the compact structural design realizes the adjustable posture of the optical fiber head, the diaphragm and the collimating lens, and the detailed structure of the collimating device is designed according to the actual installation environment. The optical fiber head and the diaphragm are integrally fixed on the same optical fiber seat, the optical fiber seat is radially translated and adjusted by using the fine adjustment screw, the optical fiber seat is axially adjusted by the rotating shaft collar, the optical fiber seat is rotated to realize circumferential adjustment of the optical fiber seat, the field of view of outgoing light of the optical fiber is controllable, three-dimensional translation and one-dimensional rotation around the optical axis are realized, and the field of view of the incident light entering the collimating lens is ensured to be controllable in size and angle position. In addition, the optical fiber head, the diaphragm and the collimating lens are directly or indirectly carried by the lens bracket, and the angle adjusting device provided by the module bracket drives the lens bracket to change in pitch and azimuth, so that the direction adjustment of the emergent light of the collimating lens can be realized.

The design concept of the utility model is not limited by the design structure in the embodiment, and the structure can be changed and optimized according to the practical installation environment of the practical occasion. Such changes and modifications are intended to be included within the scope of the present utility model as set forth in the appended claims without departing from the general inventive concept.

Claims

1. An optical fiber collimating device for an adjustable aperture, comprising:

an optical fiber seat (11) with an exit end fixedly provided with a diaphragm (19);

a shaft tube (12) the incident end of which is fixed with the optical fiber seat (11);

a lens bracket (15) sleeved on the shaft barrel (12);

a collar (13) screwed on the shaft barrel (12);

a limiting block (14), one end of which is fixed on the lens bracket (15) and the other end of which is provided with a limiting part which is blocked in front of the incident end of the shaft collar (13);

the module support (16) is fixed at the emergent end of the lens support (15) and is used as a supporting foundation of the whole optical fiber collimating device.

2. The adjustable diaphragm optical fiber alignment apparatus of claim 1, wherein: the front end of the optical fiber seat (11) is provided with a protruding part which stretches into the shaft barrel (12) and has radial clearance with the inner wall of the shaft barrel (12), the shaft barrel (12) is provided with a plurality of fine adjustment screws (18) which radially penetrate through the wall of the shaft barrel (12), and the radial position of the optical fiber seat (11) and further the radial position of the diaphragm (19) can be adjusted when the fine adjustment screws (18) inwards prop against the protruding part.

3. The adjustable diaphragm optical fiber alignment apparatus of claim 2, wherein: the circumference of the protruding part is a conical surface with an incidence end as a small end and an emergence end as a large end, and when the conical surface is pressed by the fine adjustment screw (18), the optical fiber seat (11) receives an axial backward component force.

4. The adjustable diaphragm optical fiber alignment apparatus of claim 1, wherein:

also comprises a guide pin (17);

a plurality of notches are formed in the side wall of the shaft barrel (12), corresponding guide holes are formed in corresponding positions of the lens support (15), and the width of the notches is larger than the diameter of the guide nails (17);

a guide pin (17) extends from the guide hole into the notch to radially limit and axially guide the shaft barrel (12).

5. The adjustable diaphragm optical fiber alignment apparatus of claim 4, wherein: the guide pin (17) locks the shaft (12) when pressing the notch.

6. The adjustable diaphragm optical fiber alignment apparatus of claim 1, wherein: an angle adjusting mechanism capable of adjusting the emergent light angle of the collimating mirror is arranged in the module support (16).

7. The adjustable diaphragm optical fiber alignment apparatus of claim 1, wherein: the incident end of the optical fiber seat (11) is fixedly provided with an optical fiber head (10) through a clamping groove.

8. The adjustable diaphragm optical fiber alignment apparatus of claim 2, wherein: the radial clearance is 0.5mm.

9. The adjustable diaphragm optical fiber alignment apparatus of claim 1, wherein: the limiting block (14) is of an L-shaped structure, and the bending part of the limiting block is blocked at the incident end of the shaft collar (13).

10. The adjustable diaphragm optical fiber alignment apparatus of claim 2, wherein: the trimming screws (18) are three, and adjacent trimming screws (18) are 120 degrees apart.