optical glass

noun 0.676

flat

noun 0.622

optical

noun 0.614

flatness

noun 0.599

optical microscope

noun 0.593

flat space

noun 0.588

flint glass

noun 0.581

optical power

noun 0.579

plane mirror

noun 0.569

flat oval

noun 0.562

photographic plate

noun 0.554

spherical mirror

noun 0.552

flattop

noun 0.550

double flat

noun 0.550

optical fibre

noun 0.547

flattener

noun 0.544

lying flat

noun 0.542

parabolic mirror

noun 0.542

flatscreen

noun 0.541

silicon wafer

noun 0.540

dioptric

noun 0.539

flattening

noun 0.538

quarter-wave plate

noun 0.537

flatting

noun 0.536

autocollimator

noun 0.533

float glass

noun 0.532

ellipsometer

noun 0.531

photomask

noun 0.529

retroreflector

noun 0.525

planum

noun 0.520

optical astronomy

noun 0.519

diffraction grating

noun 0.518

microscope slide

noun 0.517

optical spectrum

noun 0.511

horizontal plane

noun 0.510

parabolic reflector

noun 0.510

interferometer

noun 0.510

convex lens

noun 0.509

optical drive

noun 0.509

refractor

noun 0.507

artificial horizon

noun 0.506

flatiron

noun 0.506

fold flat

noun 0.505

flatcar

noun 0.505

nanoplate

noun 0.505

optics

noun 0.503

plane

noun 0.502

ground glass

noun 0.500

reflecting telescope

noun 0.500