Lens center thickness measuring device based on optical phase demodulation and measuring method using same
A technology for measuring the center and thickness of a lens, which is used in measuring devices, optical devices, instruments, etc., can solve the problems of complex detection devices, cumbersome measurement methods, and insufficient accuracy, and achieve reliable performance, improve detection speed and accuracy, low cost effect
Inactive Publication Date: 2015-05-13
JIANGSU YUDI OPTICAL CO LTD
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The above two detection devices are relatively complicated, the production cost is high, the measurement method is cumbersome, and the accuracy cannot reach the ideal effect
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[0016] Such as figure 1 As shown, a lens center thickness measurement device based on optical phase demodulation, which includes laser focusing light source 1, beam splitter I2, mirror I3, mirror II4, beam splitter II5, power detector 6 and computer 7, laser focusing Light source 1, beam splitter I2 and reflector I3 are on the same horizontal straight line, beam splitter I2 is located between laser focusing light source 1 and reflector I3, reflector II4 is located directly below beam splitter I2, and beam splitter II2 is located behind reflector I3 Directly below, reflector II4, beam splitter II5 and power detector 6 are on the same horizontal straight line, and computer 7 receives data from power detector 6.
[0017] The method of using the above-mentioned device for measurement: such as figure 2 As shown, first measure the interference optical power before adding the lens, that is, turn on the laser focusing light source to emit the beam, and the beam is divided into two o...
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The invention discloses a lens center thickness measuring device and method based on optical phase demodulation. The device is characterized by comprising a laser focusing light source, a light splitter I, a reflection mirror I, a reflection mirror II, a light splitter II, a power detector and a computer, the laser focusing light source, the light splitter I and the reflection mirror I are located on the same horizontal straight line, the light splitter I is located between the laser focusing light source and the reflection mirror I, the reflection mirror II is located under the light splitter I, the light splitter II is located under the reflection mirror I, the reflection mirror II, the light splitter II and the power detector are located on the same horizontal straight line, and the computer receives data of the power detector. The measuring device has the advantages of being simple in structure, low in cost, reliable in performance and capable of achieving non-contact detection and improving detection speed and accuracy.
Description
technical field [0001] The invention relates to a lens center thickness measurement device and a measurement method, belonging to the field of optical lens detection. Background technique [0002] In the field of optics, the lens is one of the most important parts of optical instruments. The three basic parameters of the lens are central thickness, refractive index and radius of curvature. The error of the lens central thickness processing is an important factor affecting the imaging of the optical system. For example, in high-precision optical system products such as aviation and aerospace, there are strict requirements on the tolerance of the lens. The optical axis deflection angle, radial offset and axial clearance of the lens need to be precisely adjusted according to the center thickness of the lens in the lens. . [0003] The existing methods for measuring the thickness of the lens center include contact measurement and non-contact measurement. [0004] In contact me...
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IPC IPC(8): G01B11/06
Inventor 孙玉娟吴迪富姚红兵李丽淋单国云吴广剑
Owner JIANGSU YUDI OPTICAL CO LTD