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A f-theta optical mold processing method

A mold processing and optical technology, applied in the field of ultra-precision machining, can solve problems such as the influence of stable machining results

Active Publication Date: 2015-12-09
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The stability of the multi-axis linkage numerical control (NC) system and the error introduced by the real-time interpolation operation of the NC system during machining will also have a certain impact on the machining results.

Method used

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  • A f-theta optical mold processing method
  • A f-theta optical mold processing method
  • A f-theta optical mold processing method

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Embodiment Construction

[0049] like figure 1 As shown, in the f-θ optical mold processing method of the present invention, the arc envelope cutting method is adopted, and the cutting tool 1 processes the f-θ optical mold 3 along the cutting track 2 .

[0050] The tool center point trajectory (x d ,y d ,z d ) and workpiece surface point coordinates (x s ,y s ,z s ) fits equation (1):

[0051] x d = x s + r d sin θ y d = y s ...

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Abstract

The invention discloses a non-axisymmetrical aspheric f-theta optical mold ultra-precision machining method which is based on an arc envelope cutting method and can effectively guarantee machining precision by reducing the number of linkage axes. The arc envelope cutting method can effectively reduce tool wear during machining and can better meet the demands of f-theta optical mold ultra-precision machining. Moreover, by reducing the number of linkage axes, i.e. optimizing the traditional 3-axis linkage machining into 3-axis 2-linkage machining, on one hand, the dependence on an ultra-precision multi-axis linkage NC (Numerical Control) system is relieved, and on the other hand, errors caused by real-time interpolation operation of the NC system during machining are reduced, so that motion errors of a space system are effectively reduced and the machining precision is fully guaranteed.

Description

technical field [0001] The invention relates to the field of optical mold processing, in particular to an optimized ultra-precision machining method for non-axisymmetric aspheric f-θ optical molds. Background technique [0002] Non-axisymmetric aspheric f-θ (F-Theta) optical element is an important type of free-form optical element and an indispensable and important component in laser scanning systems. It is widely used in missile tracking sights, laser printers (LaserPrinting) and laser Marking machine (LaserMarking) and other precision equipment to meet the requirements of constant-velocity scanning plane perfect imaging. [0003] The traditional f-θ optical element processing mainly adopts grinding processing, that is, using tools such as grinding wheels to directly process glass materials. At present, spherical grinding wheel grinding, on-line electrolytic dressing grinding (ELID) and electrochemical on-line grinding are widely used. Controlled Dressing (ECD), etc. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B1/00
CPCB23B1/00
Inventor 郭江殷跃红姜振华徐勇洪海波王乾人孙立剑
Owner SHANGHAI JIAOTONG UNIV
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