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home -> products -> optino -> technical specifications

Technical Specification of Optino Wavefront Sensor

Specification		Optino

Focal ratios covered ^(1,2)		f/0.5 to f/300 standard

Diameter of optical element that can be tested ⁽³⁾		Practically any diameter

Diameter of lenslets ⁽⁴⁾		0.2 mm. Other diameters available on request

Focal length of lenslets ⁽⁵⁾		22 mm. Other focal lengths available on request

Standard sampling on the pupil ⁽⁶⁾		30 x 30 spots

Maximum sampling ⁽⁷⁾		100 x 100 spots with large format camera

Analysis Software		Sensoft

Repeatability of measurement of Zernike polynomials ⁽⁸⁾		< λ l/300 rms

Rms repeatability of wavefront measurement ⁽⁹⁾		< λ l/200 rms

Absolute precision ⁽¹⁰⁾		Depends on the surface quality of the reference optical element. Typically λ/10 (for spherical surfaces) - λ/40 (flat surfaces)

Wavelength range (visible camera) ⁽¹¹⁾		0.375-1.1μ with standard uncooled camera. 0.325-1.1μ with cooled camera

Wavelength range (NIR camera) ⁽¹¹⁾		0.4-1.8μ

Wavelength range (UV camera) ⁽¹¹⁾		0.193-1.1μ

Tilt measurement accuracy (angle depends on the size of the optical elemens)		4μrad

Dynamic range of measurement by sub-pupil(tilt and defocus mathematically subtracted), depends on combination of aberrations		~ ± 50λ

Acquisition speed (uncooled camera)		4 Hz

Processing speed		1-2 Hz (configuration dependent)

Built-in collimator for providing parallel light		Fixed or motorized

Camera for SH ⁽¹²⁾		10-bit uncooled CMOS or 16-bit cooled CCD

Dimensions (with motorized collimator)		9 (H) x 22 (L) x 9 (W) cm.

Power requirement (Fiber optic light source)		120 V or 220 V

Power requirement (stepper motor)		12V, 500 mA

Working temperature		-5 to 50⁰ C (with motorized collimator)

Notes and explanations for the specifications table:
1. See the configurations sheet for the various test setups.
2. These values are for converging optical elements. Diverging optical elements can be tested in combination with a converging lens or       mirror. Larger or smaller focal ratios can be tested using a different optical setup.
3. With the appropriate auxiliary optics, optical elements of almost any diameter can be tested.
4. Lenslets with different diameters available on request.
5. Lenslets with different focal lengths available on request.
6. With the standard CMOS camera that has a chip size of 6.8 x 8.5 mm². Pixel size: 6.7 µ.
7. Depends on the chip size of the camera. In Optino the camera is mounted externally, and can be changed easily. For details, see separate       section.
8. Repeatability of measurement obtained by combining 100 SH images taken in succession. The error of this coefficient depends on the       sampling used for obtaining the SH frame.
9. Repeatability of measurement obtained by combining 100 SH frames taken in succession.
10. This will determine the final accuracy of the measurements, as the SH test is a differential test.
11. Other cameras with an extended range can be used.
12. Cooled camera may be needed in situations where a low reflectivity from the optical surface may require exposure times longer than        100 ms.