Dual-band lens
Dual-enclosure optoelectronic packages
Dual-focus objective lens of optical pickup
Dual-focus switchable lens
Dual-imaging optical system
Dual-imaging optical system
Dual-imaging optical system
Dustproof lens assembly
Dynamic aberration correction of conformal/aspheric domes and wi
Dynamic compensating laser telescope apparatus
Dynamic light beam deflector
Eccentric Fresnel lens sheet and method of making same
Eccentricity-prevention mechanism for a pair of...
Editable instrument assembly
Educational lens
Elastic lens holder
Elastomer lined CRT-to-lens coupler
Electrically driven zoom lens barrel
Electrically driven zoom lens barrel
Electrically-adjustable variable power rifle telescope