Slit width control mechanism for spectrophotometer

Abstract

Abstract PURPOSE:To achieve a fine slit width control, by holding a relationship between a wavelength as predetermined and a slit width at a control section to drive a piezo-electric linear motor for controlling a slit plate in linkage with a wavelength driving made by a signal from the control section. CONSTITUTION:In a pair of slit plates 20-1 and 20-2, piezo-electric linear motors 22-1 and 22-2 are fixed on the top and bottom of the slit plate 20-1 while piezo-electric linear motors 24-1 and 24-2 on the top and bottom of the slit plate 20-2. A CPU 30 holds a slit program and performs a wavelength driving of a spectroscope. To drive the piezo-electric linear motors, the CPU 30 outputs a drive signal to vary a slit width to a PZT control power amplifier 34 according to a slit program through a D/A comparator 32.

Inventors

• 👤 Hiroshi Yamamoto

Bibliographic Details