by periodically varying the intensity of light, e.g. using choppers (shutters, diaphragms for cameras G03B9/00; devices for eliminating or reducing the effect of flicker in projection systems G03B21/40)

Introduced: January 1985

Title

Titles differ between systems:

IPC: by periodically varying the intensity of light, e.g. using choppers

CPC: by periodically varying the intensity of light, e.g. using choppers (shutters, diaphragms for cameras G03B9/00; devices for eliminating or reducing the effect of flicker in projection systems G03B21/40)

Full Title

Full titles differ between systems:

IPC:

Optical devices or arrangements for the control of light using movable or deformable optical elements > for controlling the intensity of light > by periodically varying the intensity of light, e.g. using choppers

CPC:

Optical devices or arrangements for the control of light using movable or deformable optical elements (control of light by modification of the optical properties of the media of the elements involved therein G02F1/00) > for controlling the intensity of light > by periodically varying the intensity of light, e.g. using choppers (shutters, diaphragms for cameras G03B9/00; devices for eliminating or reducing the effect of flicker in projection systems G03B21/40)

No child classifications to compare. This is a leaf node in both IPC and CPC.