Term: collimator: optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam
Broader: optical device: a device for producing or controlling light | Unrelated: anthropometry: measurement and study of the human body and its parts and capacities
Broader: optical device: a device for producing or controlling light | Unrelated: icing: (ice hockey) the act of shooting the puck from within your own defensive area the length of the rink beyond the opponent's goal
Broader: optical device: a device for producing or controlling light | Unrelated: diptera: a large order of insects having a single pair of wings and sucking or piercing mouths; includes true flies and mosquitoes and gnats and crane flies
Broader: optical device: a device for producing or controlling light | Unrelated: coalfield: a region where there is coal underground
Broader: optical device: a device for producing or controlling light | Unrelated: fact: a concept whose truth can be proved
Broader: optical device: a device for producing or controlling light | Unrelated: tongue: the flap of material under the laces of a shoe or boot
Broader: optical device: a device for producing or controlling light | Unrelated: trifolium: any leguminous plant having leaves divided into three leaflets
Broader: optical device: a device for producing or controlling light | Unrelated: nightcap: a cloth cap worn in bed
Broader: optical device: a device for producing or controlling light | Unrelated: intervertebral vein: one of several veins accompanying spinal nerves
Broader: optical device: a device for producing or controlling light | Unrelated: bully: a hired thug