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Feature
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Specification
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Type of element that can be measured
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Astronomical telescopes (at Cassegrain, Prime and Newtonian focus). Telescopes in the laboratory. Lenses in external illumination
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Focal ratios covered
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f/1.8 to f/300 standard. Faster focal ratios can be tested with special setup |
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Diameter of optical element that can be tested
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Practically any diameter
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Diameter of lenslets
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0.3 mm
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Focal length of lenslets
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41 mm
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Standard sampling on the pupil
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About 26 x 26 spots
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Maximum sampling
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Up to 70 x 70 spots can be used (camera dependent)
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Analysis Software
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Sensoft
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Precision of Zernike polynomials coefficients (laboratory) |
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λ/300
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Precision of Zernike polynomials coefficients (telescope)
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0.01 "
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Precision with which the wavefront is computed
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λ/150 rms
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Wavelength range
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With standard camera from 0.375 μ up to 1.1 μ. With IR camera up to 2 μ
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Reference source
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LED with cooled camera. Remotely controlled
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Distance from flange to instrument focus
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54.8 mm
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Height of optical axis from base
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61.5 mm
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Camera for SH
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16-bit cooled CCD
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Camera for finder
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10-bit uncooled CMOS, 1280 x 1024 pixels, 7.5 μ pixel size or 14 or 16-bit cooled CCD
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Dimensions (depends from focal ratios tested)
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9 (Height) x 22 (Length) x 9 (Width) cm |
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Power requirement (stepper motor)
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12V, 500 mA
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