SOFTECO STANDARD PROJECTOR conforms to ECE-R43 regulations (Annex 3 : paragraph 9.2.).
Optical distortion tests
The test for optical distortion detailed in ECE Regulation 43 calls for a matrix of clear dots on an opaque background to simulate oncoming headlights. These can be produced to accommodate various focal lengths.
Slides with inclined lines are used in both BS 857 & DIN 52305 standards for testing angular deviation. Horizontal lines are used to test for refractive power.