Device and method for measuring off-axis amount of off-axis parabolic mirror
An off-axis parabolic mirror and off-axis paraboloid technology, which is applied to measurement devices, reflective surface testing, optical devices, etc., can solve the problems of lack of theodolite equipment, complicated and difficult operation of theodolites, etc., and achieve fast measurement speed and simple structure. , the effect of high efficiency
Active Publication Date: 2020-06-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
This type of method is very dependent on the use of theodolite, and the operation of theodolite during the measurement process is relatively complicated
For example, CN106932179A discloses a method and device for calibrating the off-axis amount of an off-axis parabolic mirror based on a grating ruler and a theodolite. The theodolite determines the characteristic position of the off-axis parabolic mirror, and then cooperates with the grating ruler to measure the off-axis amount of the off-axis parabolic mirror. While it is possible to accurately measure off-axis quantities, this is not feasible for many optical laboratories, may lack the required theodolite equipment, and is generally less feasible
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[0030] Such as figure 1 As shown, an off-axis measurement device for an off-axis parabolic mirror includes a laser interferometer 1, a self-collimating plane mirror 2 with a diameter slightly larger than the parabolic mirror to be measured, a laser 3, and a tilt-translation lifting platform 4, wherein the laser 3 is installed on Tilt on the translation lift table 4. The auxiliary device is a flat plate with small circular holes.
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Abstract
The invention relates to a device and method for measuring the off-axis amount of an off-axis parabolic mirror, and belongs to the technical field of optical component measurement. Aiming at the off-axis parabolic mirror of which the back surface is vertical to the optical axis, the positions of the mechanical center of the off-axis parabolic mirror and the optical axis of the parabolic mirror arerespectively positioned based on a laser interferometer and a laser by utilizing the linear propagation principle of light, and the measurement of the off-axis amount of the off-axis parabolic mirroris realized by measuring the distance between the two positions. Off-axis quantity measurement can be conveniently, effectively, efficiently and rapidly completed in a general optical laboratory, andmeanwhile, the complexity of the measurement device is reduced.
Description
technical field [0001] The invention relates to a measuring device and a measuring method for the off-axis amount of an off-axis parabolic mirror, and belongs to the technical field of measuring optical components. Background technique [0002] During the development of space optical technology, the traditional coaxial optical system has been unable to meet the needs of actual production and life. An off-axis optical system is an optical system in which the optical axis of the aperture does not coincide with the mechanical center of the aperture. Due to its simple structure, no chromatic aberration, and wide application range, the off-axis optical system has been paid more and more attention by people, and is widely used in engineering fields such as radiation calibration, wide-band target simulation and measurement. [0003] Parabolic mirror refers to a mirror whose reflective surface is a paraboloid. If a "point light source" is placed at its focus, the light will be emit...
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IPC IPC(8): G01B11/02G01M11/00G01M11/02
CPCG01B11/02G01M11/005G01M11/0271
Inventor 王姗姗徐博文周书红张南生郝群胡摇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY