CN2534597Y

CN2534597Y - Optical collimator

Info

Publication number: CN2534597Y
Application number: CN 02224649
Authority: CN
Inventors: 王崇德
Original assignee: XI'AN ZHONGWEI TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: XI'AN ZHONGWEI TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2002-03-18
Filing date: 2002-03-18
Publication date: 2003-02-05
Anticipated expiration: 2012-03-18

Abstract

The utility model relates to an optical collimating device, in particular to an optical collimating device suitable for semi-conductive laser collimation, consisting of two optical lenses. The utility model is characterized in that R of the left surface of the first lens is from 22 to 24mm and R of the right surface is from 596 to 605mm; R of the left surface of the second lens is from 6 to 7mm and R of the right surface is from 9 to 10mm; the internal center distance between the two lenses is from 17 to 18mm.

Description

The optical alignment device

Affiliated field: the utility model relates to a kind of optical alignment device, and definite saying relates to a kind of optical alignment device that is adapted to semiconductor laser collimation usefulness.

Background technology: the output beam of semiconductor laser has certain angle of divergence, this is because the principle of work of semiconductor laser determines, when semiconductor laser was used for range finding, location, the light beam of its output all needed to collimate, to guarantee the accuracy of range finding, location.The process of collimation is that the output beam with semiconductor laser becomes a branch of light beam by the approximate parallel transmission of certain pore size behind optical lens.Light beam after collimation is handled requires the angle of divergence the smaller the better.Fig. 1 is the embodiment by the colimated light system of desirable light source design, is positioned at the optical axis O front focus one pointolite S of a lens L, and behind desirable lens L, it is output as the light beam of a branch of parallel transmission, and the diameter of light beam is relevant with the focal length of lens.Noise spectra of semiconductor lasers or other laser instrument, the design of collimator apparatus exists following problem, one, in fact semiconductor laser or other laser light source are not ideal point light sources, but the emission light of a shape with a tight waist, therefore the optical alignment device by Fig. 1 design will can not produce a branch of parallel beam; Its two, common optical lens itself exists aberration, for monochromatic source, mainly is spherical aberration, coma or distortion: its three, requiring under the high situation of utilization ratio of optical energy, the optical system relative aperture of design is big more, it is difficult more to overcome lens aberration.Generally the relative aperture of colimated light system is about 1/10.

Summary of the invention: the purpose of this utility model is a kind of capacity usage ratio height of design, and aberration is little, and angle of divergence R is less than the optical alignment device of 0.6mrad.

The purpose of this utility model is achieved in that a kind of optical alignment device of design, and it is made up of two optical lenses, it is characterized in that: first lens left side R value is between 22～24mm, and the R on the right side is between 596～605mm; The R value on second lens left side is between 6～7mm, and the R value on the right side is between 9～10mm; The interior centre distance of two lens is at 11～13.5mm, and the outer centre distance of two lens is between 17～18mm.

The external diameter of described two lens is _ 8mm.

Described first lens center thickness is between 2～3mm, and the center thickness of second lens is between 2.7～3.2mm.

The material of described lens is ZF6.

Less than 0.6mrad, relative aperture is less than 1/1.5 according to its angle of divergence of optical alignment device R of above-mentioned parameter design, and aberration is less than 0.003mm.The utility model designs by optical wavelength λ=635～650nm.

Below in conjunction with the embodiment accompanying drawing the utility model is described further:

Description of drawings: Fig. 1 is the embodiment by the collimator apparatus of desirable light source design;

Fig. 2 is an embodiment light path synoptic diagram of the present utility model;

Fig. 3 is the optical structure chart of first lens;

Fig. 4 is the optical structure chart of second lens;

Among Fig. 2, L ₁, first slice lens; L ₂, second slice lens.

Embodiment: as Fig. 2, Fig. 3, shown in Figure 4, the optical alignment device is by two optical lens L ₁And L ₂Form, R1 is lens L ₁Left side spherical radius value, it is worth between 22～24mm, and R2 is L ₁Right spherical radius value is between 596～605mm; R3 is lens L ₂Left side spherical radius value, between 6～7mm, R4 is lens L ₂Right spherical radius value is between 9～10mm; L ₁And L ₂Interior centre distance D3 between 11～13.5mm, L ₁And L ₂Outer centre distance D4 between 17～18mm.L ₁And L ₂External diameter be _ 8mm that the effective aperture is _ 6mm.L ₁Center thickness D1 be between 2～3mm, L ₂Center thickness D2 be between 2.7～3.2mm.

Claims

1, optical alignment device, it is made up of two optical lenses, it is characterized in that: first lens left side R value is between 22～24mm, and the R on the right side is between 596～605mm: the R value on second lens left side is between 6～7mm, and the R value on the right side is between 9～10mm; The interior centre distance of two lens is at 11～13.5mm, and the outer centre distance of two lens is between 17～18mm.

2, optical alignment device according to claim 1 is characterized in that: the external diameter of described two lens is _ 8mm.

3, optical alignment device according to claim 1 is characterized in that: described first lens center thickness is between 2～3mm, and the center thickness of second lens is between 2.7～3.2mm.

4, optical alignment device according to claim 1 is characterized in that: the material of described lens is ZF6.