Production method of off-axis paraboloid mirror

An off-axis parabolic mirror and manufacturing method technology, applied in manufacturing tools, glass manufacturing equipment, lenses and other directions, can solve the problems of large diameter of parent parabolic mirror, rising processing cost, inability to process, etc., to achieve convenient measurement, reduce processing cost, Instrument Simple Effects

Inactive Publication Date: 2003-09-24
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is relatively mature in technology. However, since the size of the parent parabolic mirror is much larger than the required off-axis parabolic mirror, it can only be applied to mirrors with a diameter of about 100 mm and a small off-axis distance. When the diameter is above 200 mm, the diameter of the axisymmetric parent parabolic mirror often needs to be above 500 mm, the processing cost rises rapidly, and the price increases sharply with the increase of the size, and even the parent parabolic mirror cannot be processed because the diameter of the parent parabolic mirror is too large

Method used

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  • Production method of off-axis paraboloid mirror
  • Production method of off-axis paraboloid mirror

Examples

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Embodiment 1

[0030] Example one: see attached figure 1 As shown, the manufacturing method of the present invention is used to make an off-axis parabolic mirror with a diameter of Ф=420 mm and the focal length of the parent parabola f 0 = 5000 mm, off-axis amount H = 700 mm, including the following steps:

[0031] (1) Making mirror blanks;

[0032] (2) Design and process a metal square mirror frame 1, put the mirror blank 2 into the mirror frame 1, with the mirror surface facing up, 2 mm to 3 mm above the surface of the mirror frame 1, and the gap between the mirror blank 2 and the mirror frame 1 is 0.3 mm to 0.4 Millimeters, insert 4 plastic sheets with a thickness of 0.10 to 0.15 mm at equal distances along the periphery of the lens blank, and seal the gap around the gap with medical white tape to prevent the polishing liquid from flowing in; engrave a line in the center of one side of the lens frame and follow this one Line, also engrave a mark on the place where the lens blank 2 is higher t...

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Abstract

The production method of off-axis paraboloid mirror includes the following steps: making mirror blank; using a metal rectangular mirror frame; placing the mirror blank into the mirror frame and closing gap; respectively making marks on the centre of one side of mirror frame and correspondent position of mirror blank; polishing initial spherical surface of mirror blank; setting detection optical circuit, regulating angle and position of rectangular mirror frame relatively to parallel optical beam, making mirror surface angle meet requirements for off-axis quantity; using knife-edge shadow method to detect mirror surface; according to the shadow picture of 2-D knofe-edge regrinding mirror surface, repeatedly detecting and regrinding until the shaow picture is uniform in light and shade, so that the required off-axis paraboloid mirror can be obtained.

Description

Technical field [0001] The invention relates to an aspheric surface manufacturing technology, in particular to a processing method of an off-axis parabolic mirror. Background technique [0002] Off-axis parabolic mirror is a mirror that does not contain a part of the axis of symmetry from a rotationally symmetrical parabolic mirror. Because it can produce high-quality parallel beams without center blocking with a simple surface shape, it has gradually become an application in recent years. Wider optical parts. [0003] Because off-axis parabolic mirrors have lost their rotational symmetry, they cannot be processed and polished on a mirror grinding machine according to the traditional method. It is generally believed that if off-axis parabolic mirrors are to be processed with a certain precision, the glass blank size should be off-axis parabolic. The required caliber post-grinding becomes possible only after the use of computer-controlled optical processing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B19/04G02B3/02
Inventor 潘君骅钱煜胡建军
Owner SUZHOU UNIV
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