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