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Active bearing controller for grinding high precision, large aperture thin minute face of astronmonical telescope

An astronomical telescope, large-diameter technology, applied in telescopes, program control design, optics, etc., to achieve the effect of ensuring manufacturing accuracy

Inactive Publication Date: 2006-04-19
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] No. 01113668.5 Chinese invention patent discloses a "large-scale astronomical telescope mirror displacement control system"; It belongs to the thin mirror control technology required in the telescope manufacturing technology, but it has a positive reference effect on solving the above problems

Method used

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  • Active bearing controller for grinding high precision, large aperture thin minute face of astronmonical telescope
  • Active bearing controller for grinding high precision, large aperture thin minute face of astronmonical telescope
  • Active bearing controller for grinding high precision, large aperture thin minute face of astronmonical telescope

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Embodiment 1

[0014] Embodiment 1, a key project of the National Natural Science Foundation of China, high-precision large-diameter astronomical mirror grinding technology is a research topic for the needs of my country's construction of large-scale astronomical optical telescopes, in which the high-precision large-diameter astronomical telescope thin mirror grinding is used for the first time Active support device, the diameter of the thin mirror optical detection system mirror is: 1035mm, the thickness is: 25mm, 55 sets of actuators are placed on the back of this mirror; 3 sets of them are fixed supports and 52 sets of force actuators. The force actuator is provided with a stepping motor, the output of the optical detection system is connected to the computer, and the computer is connected to the stepping motor through the driver. refer to figure 1 : Agreed interface address and related control word registers: seven digital output control interface cards are adopted in the active support o...

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Abstract

The controlling apparatus includes bearing table and optical detecting system. Several supporters for mirror plate are setup on the said tabletop. The said supporter includes more than three pieces of fixed supporter and actuator as active supporter. Output of optical detecting system connected to computer, which through drive is connected to step motor. The step motor drives actuators. Optimized scheme is that output of computer is connected to each control interface card, which controls each step motor. In grinding process, the apparatus carried out dynamic testing, and adjusting supporters. Control precision reaches 5 / 10000, and root mean square is not greater than 50mN.

Description

technical field [0001] The invention relates to equipment for processing and manufacturing astronomical telescopes, in particular to an active support control device for mirror grinding of high-precision large-diameter astronomical telescopes. Background technique [0002] The traditional astronomical telescope mirror grinding work uses passive support, or static support, that is, the mirror material (optical glass) is placed on the load-bearing platform and ground by machinery. During the grinding process, it is necessary to use additional testing equipment to continuously test the mirror surface. The thickness of the material of the traditional mirror is relatively large, and its rigidity is enough to overcome the deformation of the material caused by external force. The development trend of modern astronomical telescopes is to use large-aperture thin mirrors. The astronomical telescope with large aperture and thin mirror has many advantages such as large aperture and li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/02G06F9/00
Inventor 张振超崔向群王佑李新南
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE