Aspheric surface grating replication method
An aspheric, new method technology, applied in the field of spectroscopy, can solve the problems of easy flow, cracking, and excessive thickness of the epoxy resin glue, and achieve the effects of shortening the production cycle, saving costs, and being easy to implement.
Inactive Publication Date: 2008-02-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
If the radius of curvature of the substrate is too large, the epoxy resin glue in the center between the aspheric grating on the motherboard and the replica substrate will be too thick, which will easily cause cracking due to the influence of temperature after separation; if the radius of curvature of the substrate is too small, it will cause the motherboard to The central part between the spherical grating and the replication substrate is in contact, and the epoxy resin glue on the edge is too thick, which will also cause cracking due to the influence of temperature, and the epoxy resin glue on the edge is easy to flow out
Method used
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[0010] The present invention is implemented according to the production steps of the technical scheme shown in Fig. 1 and Fig. 2, and the details are as follows:
[0011] 1. Choose a table without flaws and good surface quality master aspherical gratings, we use concave gratings;
[0012] 2. According to the principle that the peak-to-valley value of the master aspheric grating substrate and the primary copy substrate should be the smallest, the aspheric equation y 2 +z 2 = 2Rx-(1-e 2 )x 2 , Numerical calculation example accurately solves the radius of the master aspherical grating closest to the spherical surface, which is the radius of a copy of the base;
[0013] 3. Put the master aspheric grating into the vacuum coating machine to plate the separation oil and aluminum film;
[0014] 4. Use epoxy resin glue to bond the primary copy substrate and the master aspheric grating, and the bonding work is carried out in a drying oven at 60°C;
[0015] 5. Put the bonded master aspheric ...
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The utility model relates to a new method of non-spherical grating copy, belonging to a method of non-spherical grating copy in the spectrum technical field. The technical problem to be solved is providing a new method of non-spherical grating copy. The utility model adopts the technical proposal with following steps: firstly, selection of a non-spherical grating mother version; second, selection of a copying base; third, fabrication of a first copy version; fourth, fabrication of a second copy version. The utility model has the advantages of novel method, low cost and easy implementation. The fabrication cycle is shortened, and various lower cost non-spherical gratings can be made using the method. The method can bed used for mass production of non-spherical grating.
Description
1. Technical Field [0001] The invention belongs to a new method for aspheric grating replication involved in the field of spectroscopy technology. 2. Background technology [0002] Concave grating has self-focusing characteristics, and can form spectral lines without collimating optical system and focusing optical system during imaging. Aspherical gratings used in spectrometer systems have more superior characteristics than concave gratings, and the aberrations of the spectrometer system can be adjusted by using the grating shape of the aspherical gratings. [0003] The use of aspherical gratings can reduce the aberration of the optical system, reduce the size of the spectrometer, reduce the number of components, and improve the imaging quality, resolution and test accuracy of the spectrometer. Therefore, aspherical gratings have become an indispensable optical element for the development of spectroscopy technology. [0004] The production of master aspherical grating has disadva...
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Inventor 李文昊巴音贺希格齐向东唐玉国
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI