Method for manufacturing static stretching thin film reflecting mirror

A thin-film mirror and electrostatic technology, which is applied in installation, optics, instruments, etc., can solve the problems of insufficient surface shape accuracy of electrostatic stretched film mirrors, and achieve the effect of simple electrode distribution structure, convenient operation, and improved surface shape accuracy

Inactive Publication Date: 2014-02-12
SUZHOU UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The surface shape accuracy of the electrostatically stretched film mirror processed by the above technical scheme is not enough

Method used

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  • Method for manufacturing static stretching thin film reflecting mirror
  • Method for manufacturing static stretching thin film reflecting mirror
  • Method for manufacturing static stretching thin film reflecting mirror

Examples

Experimental program
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Embodiment 1

[0018] See attached figure 1 , which is a schematic diagram of the principle structure for preparing an electrostatically stretched film mirror; fix the periphery of the film in the film mirror to be formed on the ring fixing device to obtain the initial surface, place the electrodes directly below the film, and input voltage to each electrode Signal. Since the periphery of the film in the film mirror is fixed on the ring device, when the planar film is subjected to a high pressure load, each point on the film will be displaced relative to the initial planar film position, and the film has almost no lateral stiffness and cannot bear bending moment The large deformation equation of the circular film obtained by simplification of the Karman equation circular film theory is shown in the following formulas (1) and (2):

[0019]

[0020] in is the elastic modulus of the film, is the film thickness, is the stress function, is the disturbance value, is the film radius (...

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Abstract

The invention relates to a method for manufacturing a static stretching thin film reflecting mirror. The periphery of a thin film in the thin film reflecting mirror is fixed on a circular ring fixing device. Electrodes are arranged under the thin film. The electrodes comprise a central circular electrode and annular electrodes with the equal radial width, wherein the annular electrodes are distributed in a concentric-circle mode. The radius of the central circular electrode is 1.5-1.7 time the radial width of the annular electrodes. The number of the annular electrodes is 3-10. The pressure of the central position of the radius of the central electrode is used as the pressure of the central electrode area. The pressures of radial central points of the annular electrodes are used as the pressure of the annular electrode area. The pressures are converted into voltage signals to be input to the corresponding electrodes. The static stretching thin film reflecting mirror can be obtained through machine-shaping. Compared with a standard paraboloid, the three-dimensional surface shape of the thin film reflecting mirror obtained by adopting the static shaping control method is small in error. Compared with the prior art, the static stretching thin film reflecting mirror has the advantage that the surface shape precision is remarkably improved.

Description

technical field [0001] The invention relates to a method for preparing an electrostatically stretched film mirror, belonging to the technical field of space optical imaging systems. Background technique [0002] One of the ways to realize the space optical system with large aperture and low surface density is to use a thin film mirror as the primary mirror, which uses a flexible polymer film as the base of the mirror, and forms the required curved surface in an appropriate way. Lightweight, foldable / unfoldable and low cost. Therefore, the development of thin-film mirrors is of great significance for the development of the next generation of large-aperture and low-density space optical systems. [0003] The surface shape of the film mirror under the action of uniform pressure is an approximate paraboloid, and the surface shape accuracy can be improved under the action of non-uniform pressure. The research shows that the method of combining non-uniform pressure and non-equal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/188
Inventor 蒋龙军唐敏学
Owner SUZHOU UNIV
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