EO-85/EO-86 Computer Controlled Spectrophotometer
In a compact package requiring no optical adjustments, the instrument graphically displays the relative intensity of a light source as function of wavelength. The incoming radiation is dispersed by a 700 lines/mm holographic grating. The first order spectrum is focused onto a high resolution linear CCD detector. The detector is controlled and read out by an internal 16 bit microprocessor. After exposure, the analog video signal is digitized by a 10 bit A to D converter and sent to the controlling computer. The optical components are ruggedly mounted on a stiff base plate, aligned and focused during assembly so that no user adjustments are required. The instrument has a wavelength range from 400 to 800 nm, and the spectrum is available on the screen a few seconds after exposure.
The wavelength scale can be expanded to examine details of spectral lines. Several curves can be displayed at a time, up to five with the Macintosh version. The cursor position in the Macintosh version reads out the wavelength and intensity of transmission from the screen plot.
Specifications Wavelength 400 nm to 800 nm Resolution 1 nm Grating 700 lines/mm Holographic Detector 1728 pixel low dark current CCD Collimator 20 mm x 45 mm f.l. achromat Camera 50 mm focal length f/2.8 Rodenstock Slit 25 micrometers Host Computer IBM-PC compatible w/256K memory All major graphics Macintosh System 6.7 or higher Dimensions 11.5 h x16.5 w x 23.5 d cm (4.5 x 6.5 x 9.2 in) Weight 3 kg (7 lbs) net