Phase shifting grating-slit test utilizing a liquid crystal display |
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Authors: | Chao-Wen Liang Chien-Fu Ou |
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Institution: | (1) Department of Optics and Photonics, National Central University, No. 300, Jhongda Rd., Jhongli City, Taoyuan County, 32001, Taiwan, R.O.C. |
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Abstract: | A quantified focal plane testing method, termed phase-shifting grating-slit test, is demonstrated by utilizing a micro liquid
crystal display. In contrast to the setup in the Ronchi Test, an incoherent illuminating grating is used and an optical slit
is located at the image plane of the tested lens to modulate the aberrated wavefront. With the micro liquid crystal display
generating and phase shifting the incoherent illuminating grating with variable frequency, a higher measurement dynamic range
can be achieved on demand. |
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Keywords: | grating-slit test phase shifting liquid crystal display surface testing grating |
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