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physical object > artifact > device > instrument > optical device > coating

coating
subject			fact

coating	is a kind of optical device
instrument	has operator
artifact	has creator
	has creation date
	has purpose
	has owner
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Kinds of coating :

• anti-reflection coating (2 facts) - Also AR coating. A layer of material of lower refractive index of just the right thickness (1/4 wave) is deposited on the optical surface to be coated. More complex coatings are possible which cover a large wavelength range.
• coronene (2 facts) - The first ultraviolet phosphor to be tried on the surface of a CCD.
• Lumogen (2 facts) - Fluorescent UV coating which improves the blue sensitivity of a CCD by emitting light at approximately 540 to 580 nm when excited with light of wavelengths shorter than 450 nm.