New product brightness discrimination device

New product brightness discrimination device/Visual Experiment Instrument Brightness Scale Model:BD－Ⅱ－504type

A commonly used visual experimental instrument in psychology. It can measure the threshold of brightness difference and also create a brightness scale.

This instrument consists of two circular light stimuli arranged side by side. Two light stimuli are stimulated by a common light source, and their brightness is adjusted by a slit.

Main surgical indicators of the brightness discrimination instrument:

1. Stimulating light source:15W, milky white light bulb

2. Slit through which light stimulation passes:0～10mmThe range of angle changes on the corresponding dial is0～320°

3. When the two dials display the same degree, the relative error of the brightness of the two stimuli is less than5%