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| View Original: | Optical flat test with green and white light.jpg (2305x2785) | |||
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| Keywords: Optical flat test with green and white light.jpg en A λ/10 window resting upon an λ/10 optical flat illuminated with both the green 532 nm light from a laser and white light from an incandescent bulb Image 1 shows that the fringes are fairly straight with some small deviations indicated that the surface of the window in very close to λ/10 flatness The flat has slightly chamfered edges which shows up as bends near the ends of the fringes The bottom side of the flat is mirrored which not ideal masking some of the fringes Image 2 shows the interference fringes in white light Image 3 is after an hour of wringing as the surfaces come closer to parallel Image 3 is after 2 hours or wringing Images 5 and 6 are taken after the surfaces have fully wrung becoming parallel Both the white-light test and the finger-pressure test show that the surface of the window is concave 2013-12-14 22 32 41 own Zaereth cc-zero Uploaded with UploadWizard Optics Interference patterns | ||||
