CN2585257Y

CN2585257Y - Three-separated object lens with diaphragm in front of it

Info

Publication number: CN2585257Y
Application number: CN 02288397
Authority: CN
Inventors: 黄宣劭
Original assignee: Shanghai Institute of Laser Technology
Current assignee: Shanghai Institute of Laser Technology
Priority date: 2002-12-18
Filing date: 2002-12-18
Publication date: 2003-11-05
Anticipated expiration: 2012-12-18

Abstract

The utility model relates to a three-separated objective lens with diaphragm in front, which is used for laser internal carving of various wave lengths. The utility model is characterized in that the three-separated object lens with diaphragm in front comprises a fixed diaphragm and an optical assembly, wherein, the optical assembly comprises a first lens, a second lens and a third lens; both the first and the second lenses are plane-convex lenses from the object side in turn; the third lens is a front-tooth-shaped lens; the convex surfaces of the three lenses all face the object side; the fixed diaphragm is placed in the front of the first lens. Because the utility model relates to a lens of a two-plano-convex and three-separated lens, the utility model has the advantages of small volume and compact structure, and the utility model provides an objective lens used for the laser internal carving of different wave lengths from visible light to near infrared wave band.

Description

Diaphragm places three of front end to separate object lens

Technical field

The diaphragm that the utility model relates to the body laser inner carving use that is used for the multi-wavelength places three of front end to separate object lens, is applicable to that particularly the laser beam of 0.532 μ m and 1.06 μ m is come the camera lens that reinforced mud carvings is used in the processed glass.

Background technology

Body laser inner carving is a kind of new artwork Ornament that produces along with the laser technology development, it is at the inner art treasures of being made various figures by carving of glass, be commonly called as crystal works, it utilizes the light not only can be by glass but also can be in the glass internal focus and the characteristic of explosion, cause numerous blow-up point in glass inside, effective control by light beam can be at inner needed figure and the literal of obtaining of glass, for this reason, require light beam all to obtain image quality preferably in the inner different position of glass, be the big or small basic identical of blow-up point, reaching desirable processing effect, yet, in the prior art, often adopt two cemented objectives and increase a slice lens for obtaining bigger relative aperture, because laser power is stronger, after the time is permanent, the cemented surface place is fragile, thereby influences the output of power.

Summary of the invention:

The purpose of this utility model is in order to overcome the shortcoming of prior art, provides that a kind of volume is little, easy to process, assembly technology simply places three of front end to separate object lens applicable to the diaphragm of 0.532 μ m and 1.06 mum wavelengths.

It is camera lenses that diaphragm places front end that diaphragm places three of front end to separate object lens, be characterized in that it comprises a fixed aperture and an optical group, optical group comprises first, second and third eyeglass, from object space, first, second eyeglass is plano-convex lens, prismatic glasses is positive thread form lens, and three set of contact lenses convex surfaces are all towards object space, and fixed aperture is positioned at the place ahead of first eyeglass.

The utility model adopts three unpack formats, overcome existing two cemented objectives and increase the shortcoming that camera lens that a slice lens constitute need glue together, and make the smaller volume of camera lens, processing and assembly technology are simple, can reduce cost of manufacture, simple in structure, processing effect is good, is specially adapted to the use of 0.532 μ m and 1.06 μ m Laser Processing internal carving handicraft articles.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

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

Embodiment

It is camera lenses that a kind of diaphragm places front end that diaphragm places three of front end to separate object lens, as shown in Figure 1, it comprises a fixed aperture 1 and an optical group 2, and optical group comprises first, second and third eyeglass, from object space, first eyeglass 21, second eyeglass 22 is plano-convex lens, and prismatic glasses 23 is positive crescent lens, three set of contact lenses convex surfaces are all towards object space, and fixed aperture is positioned at the place ahead of first eyeglass 21.

Diaphragm places three of front end to separate object lens in use, above-mentioned camera lens is screwed in the head 3 of laser sub-marker, as shown in Figure 2.

Claims

1, a kind of diaphragm places three of front end to separate object lens, it is characterized in that, it comprises a fixed aperture (1) and an optical group (2), optical group (2) comprises first, second and prismatic glasses, from object space, first eyeglass (21), second eyeglass (22) are plano-convex lens, and prismatic glasses (23) is positive crescent lens, three set of contact lenses convex surfaces are all towards object space, and fixed aperture (1) is positioned at the place ahead of first eyeglass (21).