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The following photos show the beam distributions of different IR light emitting diodes and laser diode arrangements using the inverting IR indicator IR-IA3. The IR indicator IR-IA3 was irradiated with filtered UV light using a DULUX S 9W/78 lamp from OSRAM. As filter we used the UV-pass filter UG-1 from SCHOTT.

Siemens IR-LED SFH 480 II (880 nm)

880 nm-IR-LED OD 50 L from Opto Diode Corp.

Focussed beam of a 830 nm laser diode

Defocussed beam of a 830 nm laser diode

Output of a CD-player laser unit (780 nm)

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