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  VUV Spectrometer

 

VUV Spectrometer

 

1. Introduction

The VS7550 is a miniature Czerny­Turner spectrograph with excellent speed, spectral range and spectral resolution with software control of slit size, input f#, order sorting filters, grating angle and dark exposures.  For VUV operation, the spectrograph has a UHV window and laminar flow purge system, which allows operation down to the window short wavelength cut­off (112 nm for MgF2).  The spectrograph is small enough to fit in your hand and can be fully operational in any orientation at the end of a 5meter cable. Accessories include a built­in spectral calibration lamp, a multi­spectral field flat light source and low­cost accessories such as telescopes, vacuum adapters, and flow controllers.

 

 

 

 

 

 

 

2. Features

    High speed Czerny Turner optics up to f/3.2 (at CCD)

    Resolution better than 0.2 nm achieved with 3600 groove per mm grating

    User interchangeable gratings from 600 to 4200 grooves per mm

     104 to 1030 NM with 1200 g/mm grating

    Computer controlled slit size from 25 to 400 microns

    Computer controlled input aperture from f/3.2 to f/8.4

    Computer controlled order sorting filters

    Computer controlled grating angle means that full range of grating can be used by creating panoramic spectrum

    Laminar flow purge system allows operation down to 104 nm

    UHV interface with window so spectrograph can be removed from UHV chamber during bake out

    Stable detector employs phosphor coating to eliminate history effects of back­thinned detectors in VUV.  Sensitivity range from 100 to 1000 NM.

    Simple USB interface for spectral acquisition and spectrograph control with up to 10meter cable.

    Extremely compact so remote operation is allowable

    Accessories include built in calibration lamp, Flat fielding LED

    NIST traceable calibrations are optional

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   
   

3. Specifiction

 

Electrical/Optical

 

Specification

 

Minimum

 

Typical/ Median

 

Maximum

 

Units

 

Focal Length (input)

 

76。0

 

76。2

 

74.44

 

mm

 

Focal Length (output)

 

41

 

46

 

48

 

mm

 

Wavelength Range  (1200)

 

104

 

­

 

1040

 

nm

 

Wavelength range (1800)

 

104

 

 

520

 

nm

 

Wavelength Range (3600)

 

104

 

­

 

340

 

nm

 

Wavelength Accuracy (1200)

 

 

±0。35

 

 

nm

 

Wavelength Accuracy (3600)

 

­

 

±0.12

 

­

 

nm

 

CCD QE 110 ­ 400nm

 

10

 

18

 

20

 

%

 

CCD QE 400 ­ 930nm

 

15

 

34

 

42

 

%

 

CCD QE 930 ­ 1050nm

 

3

 

12

 

15

 

%

 

Resolution 1200 25 mic f3。2

 

0.4

 

0.66

 

1

 

nm

 

Resolution 2400 25 mic f3。2

 

0。2

 

0.33

 

0.5

 

nm

 

Resolution 3600 25 mic f3.2

 

0。13

 

0.22

 

0。27

 

nm

 

Available Gratings

 

From 600 to 4200 grooves per mm

 

Software selectable slits, order masks and dark shutter

 

25, 50, 100, 200, 400 microns

 

Software selection of spectral range

 

3600 l/mm grating 110 to 315 (2 steps) 1200 l/mm grating 104 to 1040 (4 steps)

 

Software selection grating aperture

 

Effective range of f# 3.2 to 8.4

 

Detector

 

2048 pixel linear array with VUV/UV phosphor

 

UHV option

 

Window adapter with 2.75” ConflatTM flange

 

Connection

 

Two USB 2.0 cables for data, power and servo control

 

 

 

 

 
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Application

 


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