Patent ID: 6621610
Filing Date: 2003-09-16
Classification: G02B

Abstract:
A light deflective optical system comprising at least one deflective reflecting facet, parallel to a rotational axis and capable of being revolved or swiveled about said rotational axis, and two stationary plane mirrors, disposed to face the deflective reflecting facet, wherein a light beam incident on and thus reflected at said deflective reflecting facet is reflected successively at said two stationary plane mirrors and this reflected light beam is again incident on and reflected at said deflective reflecting facet, being characterized in thatsaid two stationary plane mirrors are disposed perpendicularly to an incident plane to have a space therebetween on the condition that said incident plane is defined as a face containing a light beam to be first incident on said deflective reflecting facet and being parallel to said rotational axis, and the light beam to be first incident on said deflective reflecting facet passes through the space between said two stationary plane mirrors and the deflected light beam after second reflection at said deflective reflecting facet outputs through the space between said two stationary plane mirrors.