Ultraviolet reflectometer

• Publisher: Elsevier Science
• Year: 1969
• Weight: 206 KB
• Volume: 1
• Category: Article
• ISSN: 0374-3926
• DOI: 10.1016/s0374-3926(69)80046-3

✦ Synopsis

ULTRA~OLET REFLECTOMETER

AN OPEN-AIR, room temperature monochromator has been constructed around a Gaertner L-114 spectrometer. The reflectometer is intended for determination of room-temperature optical constants in the near ultraviolet region of the spectrum. Principal problems in developing the system (see illustration) difference is that a holographic plate records this interference pattern as permanent changes in its transmission properties, produced by chemical changes in the light-sensitive silver compound on its surface. With lithium niobate, the interference pattern is recorded as a semipermanent change in the index of refraction through the thickness of the crystal and can be erased by heating to 170°C.