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 Gemini-180 - Single Box Direct Drive Double Grating Monochromator

Gemini 180Features

  • Direct Drive Coupled-Scanning via Single Stepper Motor
  • Double Czerny-Turner with Toroidal Optics Providing Maximum Throughput
  • Kinematic grating Mounts
  • Fully Automated Slits & Accessories (Fixed Slits Available for Radiometery)
  • Built in Computer Interfaces (RS232 & IEEE-488)
  • Wide Selection of Jobin Yvon Gratings


How the Double Additive Monochromator Works

How the double additive monochromator works

Why Use A Double Monochromator?

  • Reduces Stray Light
  • Prevents Internal Reflections

Specifications

Focal length 180mm
Aperture Ratio f/3.8
Resolution 0.15 nm
Dispersion 2.1 nm/mm
Accuracy +/- 0.5 nm
Stray Light 10-10
Kinematic Grating Repeatability +/- 0.004 nm
Drive Repeatability +/- 0.1 nm
Mechanical Range 0-1400 nm
Intermediate Slit Range 50 µm to 7 mm
Specifications based on a 1200 g/mm grating

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Spectrometer Throughput & Etendue

Optical Signal-to-Noise Ratio and Stray Light

Relationship Between Wavelength & Pixel Position on an Array

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