photointerrupter
slitmask
Fresnel zone plate
strapper
diascopic
optical prism
prism
projector
optic
episcopic
collimator
grating
diffraction grating
lens
sealed beam
beam splitter
borescope
Polaroid
nanoprobe
autocollimator
lightguide
chromatoscanner
photophone
biprism
lens system
polyrod
Wood's glass
lense
laser
coelostat
etalon
laser pointer
optical switch
nuller
goniophotometer
ring laser
sunray
Bragg mirror
Porro prism
diffusor
diffuser
microscope
luminaire
optics
light fitting
Wollaston prism
jeweler's glass
binoculars
pair of binoculars
periscope
photocounter
light fixture
beambreak
ring flash
boresight
light-emitting diode
flasher
heliostat
anaclastics
beamtrain
light-duty
abatjour
polychromator
convex lens
kaleidoscope
lamp
mirrorlike
specular
optically
two-way switch
Maglite
converging lens
headlight
optomagnonics
headlamp
photochromism
television-camera tube
opto-
gunsight
sparkling
snoot
repulsor beam
television pickup tube
photophore
speculum
opera glasses
optical device
bifocals
lampglass
luminoscope
field glasses

English words for 'An optical device that acts as a switch when a beam of light is blocked by a foreign object'

As you may have noticed, above you will find words for "An optical device that acts as a switch when a beam of light is blocked by a foreign object". Hover the mouse over the word you'd like to know more about to view its definition. Click search related words by phrase or description. to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.

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