Array echelle spectrograph

The LPA instrument of Mount (42) uses a XeCl laser to monitor absorption near the Qi(S) line group. The laser beam, expanded in a telescope to an initial area of 150 cm2, is reflected from a retroreflector array for a total optical path of 20.6 km. The returned beam and a portion of the outgoing beam follow symmetric paths through an echelle spectrograph to a pair of photodiode array detectors, thus providing both I and Z0 spectra for the... 

Image Devices. Although he never assembled an actual TV-spectrometer, Margoshes was the first to recognize the potential of TV-type detectors in analytical atomic spectroscopy. In a series of reports (50,51,52) he speculated on the advantages of using an SEC tube [vide infra] to detect radiation dispersed by an echelle spectrograph. These reports and the recent availability of various solid-state array detectors have prompted numerous... 

Figure 3.11 Schematic setup of the ARES spectrograph (1) entrance slit, (2-5) dispersive slit illumination (DSI), (6, 9) spherical mirrors, (7) prism, (8) echelle grating, (10) CCD array detector, (R1 -R5) piezo-eleclrically controlled rotation units...

In ared Spectrograph (IRS) - J. Houck, P.I., Cornell University. Will use Si As, Si Sb, and Ge Ga anays to provide spectra from 4 — 200/tm. Si arrays will use echelle to measure many orders simultaneously. 

---