Measuring screen brightness and generating triggers at stimulus onset
The Photo Sensor is a valuable tool to check the performance of a monitor or any experiment control software. This becomes essential if visual stimuli are planned to be presented on a tablet or cell phone display.
It can easily be attached to any screen with double-sided adhesive washers. Connected to the auxiliary input of an amplifier, it provides information on the brightness of the screen. In other words: The signal delivered by the sensor indicates when the screen turns brighter or darker.
Used in combination with StimTrak, a trigger is generated when the amount of light is higher than the (customizable) threshold, which means that the exact onset of any visual stimulus can be marked.
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Our products are scientific equipment for INVESTIGATIONAL USE ONLY! Medical use e.g. for diagnosis, treatment of disease or other such purposes is strictly forbidden.
|Output signal||max. 600 mV|
|Typical value at white screen||130 mV at ≥ 1 MOhm input impedance; 10 mV at 10 kOhm input impedance|
|Output impedance||120 kOhm|
|Spectral sensitivity||Lambda peak at approx. 900 nm|
|Dimensions and weight||Diameter: 15 mm, height: 5 mm
Cable length: 3 m
Weight: 10 g
|Suitable for use in MR scanner room||no|
|CE marking||The Brain Products GmbH confirms the electromagnetic compatibility (EMC) of this product according to the Directive 2014/30/ EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility.
The Brain Products GmbH confirms the RoHS compliance of this product according to Directive 2011/65/EU of the European Parliament and the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (recast published in the Official Journal of the European Union on 1 July 2011) as well as all its amendments up to and including the Commission delegated directive (EU) 2015/863 of 31 March2015 (published in the 0fficial Journal of the European Union on 4 June 2015).
Manual, Tutorials & Downloads (only for registered users)
Press Release Articles
A “how-to” guide on combining Brain Products equipment for Sport Psychophysiology
by Eduardo Bellomo, Ph.D.
Product Launch: Photo Sensor
by Dr. Roland Csuhaij