OPTICAL DESIGN

CCD-Array
Spectrometers

In a Fastie-Ebert optical configuration, light enters the monochromator through a thin entrance slit. This point source light diverges in until it arrives at a convex mirror collimating the light into parallel rays. A fixed holographic grating disperses the parallel rays of light where they are once again reflected from the convex mirror and refocused across a high-sensitivity CCD detector, ensuring absolute wavelength reproducibility without mechanical wear.

Ebert-Fastie spectrograph optical configuration

High-sensitivity CCD detector array

A high-sensitivity CCD consists of 3,648 pixel elements that are 8 microns in width. The binning of pixels coupled with the initial slit width results in a spectral bandwidth of 1.1 nm.

Each CCD undergoes treatment for enhanced for UV detection.

Fiber optics use in spectroscopy

Fiber optic sampling accessories can be manufactured in a variety of configurations for UV-Vis applications. The highest quality optical fibers are used in the assembly in all of our products. Only high-OH core fibers are capable of UV transmission down to 180 nm making it a key feature in all our assemblies.

Fiber optics allow for sophisticated optical designs and footprints not available with traditional fixed optic spectrophotometers. In addition, traditional fixed optics require multiple optical surfaces resulting in a loss of quantum efficiency that is proportional to the number of surface interactions. The flexible nature of fiber optics allows for dramatically different optical configurations and sampling options.