CN2173414Y

CN2173414Y - Semiconductor laser straight corrector

Info

Publication number: CN2173414Y
Application number: CN 93215861
Authority: CN
Inventors: 阮玉; 陈海清; 陈长缨; 余登录; 常洋燕
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 1993-06-12
Filing date: 1993-06-12
Publication date: 1994-08-03
Anticipated expiration: 2003-06-12

Abstract

The utility model relates to a semiconductor laser straight corrector which is composed of a semiconductor laser and optical collimating lens sets. The outside of the laser is provided with a regulating block in shape of cone which is arranged in the connecting base with the laser together, the three dimensional regulating centering and the aligning are realized by the regulating screw on the connecting seat, the other end of the connecting base is provided with three groups collimating lens sets with four pieces structure, the first piece is flat convex lens, the aberration which is resulted from the tolerance of the glass thickness at the laser window can be conveniently corrected by correcting the flat and the thickness of the convex lens. The utility model has the advantages that the collimating performance is favorable, the energy of light coupling efficiency is high, the cost is low, the capabilities of the bearing vibration and shock are strong, the batch production is convenient, etc.

Description

Semiconductor laser straight corrector

The utility model belongs to the semiconductor laser alignment device that a kind of semiconductor laser and optical alignment camera lens common combination form.

Semiconductor laser because have that volume is little, low in energy consumption, the life-span is long and can directly modulate, be the perfect light source of CD storage technique, and extensively apply to every field such as laser fiber communication, laser hologram, laser collimator, laser printer.Simultaneously, along with improving constantly and improve of semiconductor laser technology, it will progressively replace the laser instrument of the other types such as He-Ne that size is big, power consumption is high.But the present external semiconductor laser alignment device that adopts, the shape of its optical lens and structure are not easy to revise the aberration that semiconductor laser window glass thickness deviation is caused, and optical texture and mechanical hook-up are separated, and are not easy to the debugging of semiconductor laser and colimated light system.

The purpose of this utility model is, designing a kind of semiconductor laser and colimated light system of collecting is one, and has three-dimension adjusting mechanism and can revise aberration easily and finish semiconductor laser alignment device to center and fine registration.

The utility model mainly is made up of laser tube assembly, adjusting mechanism, Connection Block, collimating mirror group, mirror holder and trim ring etc.It forms structure and adjusts principle as follows:

Semiconductor laser 1 is placed in the Connection Block 2, it is tapered regulating block 3 that a cylindrical is arranged outside the housing of laser instrument 1, rely on Connection Block 2 peripheries and go up the set screw more than three or three 4 that distributes, realize the translation of semiconductor laser in X-axis and Y direction, carry out center adjustment, and mobile, the realization precision optics collimation of realizing the Z-direction of trace; The collimating mirror group is placed in the mirror holder 5, and mirror holder 5 is placed in the Connection Block 2, by regulating the relative position between mirror holder 5 and the Connection Block 2, also can realize moving of Z-direction, to carry out optical alignment.Said collimating mirror group is 3 group of 4 slice structure, promptly form by a slice convex lens 6, a slice meniscus lens 7 and a cemented doublet 8, convex lens 6 are placed in the end near semiconductor laser 1, its one side towards semiconductor laser 1 is the plane, and it act as and can revise the plane of convex lens 6 according to the outer window thickness deviation of laser instrument 1 active hub, to change the thickness of its lens, reach the purpose of revising aberration, convex lens 6 revised thickness, establishing an equation under can complying with reference to figure 3 draws:

T _L′＝T _L－T _WN _W ³（N _W ²－1）／N _W ³（N _L ²－1）

In the formula: T _L'=adjusted thickness; T _LThickness under the=normal condition;

N _LThe refractive index of=lens; N _WThe refractive index of=laser window;

T _W=laser window thickness.

Work as N _L=1.76, N _W, T is arranged at=1.51 o'clock _L'=T _L=0.966T _W

Advantage of the present utility model is, because semiconductor laser and colimated light system are packaged together effectively, and be provided with three-dimension adjusting mechanism, so make the said semiconductor laser alignment device of the utility model have volume little, lightweight advantage, and can realize easily center adjustment and precise alignment; Because first lens adopted planar convex lens,, can not destroy the shape of optical mirror slip and the composition of optical texture again so make in the process of revising aberration.To collimate performance in addition good for this device in addition, the light energy coupling efficiency height, and optics, machine cost are low, and it is strong to bear vibration and impact capacity, is convenient to batch process, can be widely used in fields such as laser printer, laser hologram, laser-optical disk, laser detection and optical-fibre communications.

Fig. 1 semiconductor laser alignment device structural drawing;

Fig. 2 semiconductor laser alignment device optical texture schematic diagram;

Fig. 3 correction lens are to proofread and correct the key diagram of picture lid.

Be described further below in conjunction with accompanying drawing 1 described structure.

Outside said semiconductor laser 1 housing, there is a cylindrical to become tapered regulating block 3, regulating block 3 is placed in the Connection Block 2 with semiconductor laser 1, on the periphery of Connection Block 2 corresponding regulating blocks 3, be distributed with 4 and the contacted set screw 4 of regulating block 3 conical surfaces, be used for usefulness to center adjustment and precise alignment, after adjusting, at regulating block 3 surface of contact with semiconductor laser 1, and in the space between regulating block 3 and Connection Block 2 in addition binding 9 fix.The other end at Connection Block 2 is mounted with optical alignment mirror holder 5, be mounted with the lens of 3 group of 4 chip architecture in the mirror holder 5, its first group of lens near semiconductor laser 1 are planar convex lens 6, its plane is towards semiconductor laser 1, second group is meniscus lens 7, its convex surface is consistent with planar convex lens 6, and the 3rd group is the balsaming lens 8 that a pair of is synthesized by meniscus lens and biconvex lens, and its biconvex lens is positioned at ragged edge.Adopt screw thread 10 to be connected between said Connection Block 2 and the mirror holder 5, in the position of Connection Block 2 corresponding to mirror holder 5, can be useful on the fixing hole slot 11 of binding, after the collimation position of mirror holder 5 in Connection Block 2 adjusted, can be in hole slot 11 fixedly mirror holder 5 and Connection Block 2 of binding 9 in addition.Said binding 9 can be a glue.The collimating mirror group is fixing by trim ring 12.

Claims

1, a kind of semiconductor laser alignment device, form by main semiconductor laser, adjusting mechanism, Connection Block, collimating mirror group, mirror holder etc., it is characterized in that, outside said semiconductor laser housing, there is a cylindrical to become tapered regulating block, semiconductor laser is placed in the Connection Block with regulating block, be distributed with on the Connection Block periphery more than three or three with the contacted set screw of the regulating block conical surface, the other end at Connection Block, be mounted with the optical alignment mirror holder, be mounted with the collimating mirror group in the mirror holder, the collimating mirror group is fixed by trim ring.

According to the said laser aligner of claim 1, it is characterized in that 2, said collimating mirror is 3 groups of 4 lens arrangements, first group of lens near semiconductor laser are planar convex lens, its plane is towards semiconductor laser, and second group is meniscus lens, and the 3rd group is a cemented doublet.

3, according to the said laser aligner of claim 1, it is characterized in that, between said Connection Block and the mirror holder, can connect and adjusting with engage thread.

4, according to the said laser aligner of claim 1, it is characterized in that,,, can be useful on the fixedly hole slot of mirror holder of binding corresponding to the position of mirror holder at Connection Block.

5, according to the said laser aligner of claim 1, it is characterized in that, between said semiconductor laser and tapered regulating block; Between said tapered regulating block and Connection Block; Between said Connection Block and mirror holder, can adopt glue to be fixed.