Indicator class pattern Diffractive Optical Element
Product projection angle:
Cross Projection Angle (FOV): 10.5 degrees
Eight-point projection angle (FOV): 7 degrees, 3.5 degrees and 2 degrees
Circle Projection Angle (FOV): 3.5 degree, 2.5 degree
2. grating lens should pay attention to dust prevention. If there is dust on the grating, it will cause light pricking.