SpotOn USB 2.0-Position Sensing

A portable, fast and accurate optical beam positioning system having a USB2.0 interface.

The system is based on a 24 bit A/D electronics box, powered via the  USB2.0 port.

It offers simultaneous operation of one or two PSD’s in one system.

The PSD’s are Lateral Effect type or Four-Quadrant type.  There is a variety of sensor head types and sizes.

The update rate is up to 150 Hz when using a 500 Hz digital filter. The spectral range is 350-1100nm.

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Specifications

Detector	N – Lateral Effect	L – Lateral Effect	U – Four Quadrant	Q – Four Quadrant
Size	10 x 10 mm	9 x 9 mm	10 x 10 mm	10 x 10 mm
Type	Dual axis Si with glass cover	Dual axis Si with glass cover	4x Si sectors seperated by 10 μm gap, glass cover	4x Si sectors seperated by 10 μm gap, glass cover
Usable beam size	⌀50μm to ⌀8 mm	⌀50μm to ⌀9 mm	⌀50μm to ⌀5 mm	⌀50μm to ⌀5 mm
Poisition measurement range	⌀8 mm	⌀9 mm	One beam radius up to ±2.5 mm	One beam radius up to ±2.5 mm
Position resolution	Down to 0.1 μm at 50 Hz digital filter plus averaging	Down to 0.1 μm at 50 Hz digital filter plus averaging	Down to 0.25% of beam size	Down to 0.25% of beam size
Position accuracy	±25 μm over 8 mm dia.	±12.5 μm over 8 mm dia.	±1μm or ±0.025% of beam size	±1μm or ±0.025% of beam size
Update rate	Max. 150 Hz at 500 Hz digital filters
Operational Spectral range	350 – 1100 nm
Power range	10 μW to 10 mW with attenuating ND filters
Power accuracy (*)	±5%

Ordering Information

SPOTUSB – A complete system including manifold box, USB2.0 cable, software and user manual on CD disk, carrying case.

Select one or two sensor heads, calibration files are saved on the PSD heads and loads automatically to the software:

• L – Lateral Effect PnP 9mmx9mm, no glass cover
• N – Lateral Effect Pnp 10mX10mm, with glass cover
• Q – Four Quadrant PnP 10mmX10mm with 30um gap, no glass cover
• U – Four Quadrant PnP 10mmX10mm with 10um gap, with glass cover

Additional optional heads:

L44 – Lateral Effect PnP , usable beam size < 25mm

L18 – Lateral Effect PnP 18mmX18mm with glass cover

L4   – Lateral Effect PnP 4mmX4mm, no glass cover

Optional accessories:

NG4 filter – ND filter in housing (3/4″ – 32 thread)

NG9 filter   ”     “

NG10 filter  ”    “

Hood – 55mm long, for ambientlight suppression