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Spectroscopy Links Introduction Monochromator Specification Table Spectrometer Throughput & Etendue Optical Signal-to-Noise Ratio and Stray Light Relationship Between Wavelength & Pixel Position on an Array Entrance Optics Holographic Gratings Ruled Gratings I need higher resolution I need a larger aperture I need a single channel detector I need a multichannel detector I need a source Downloads Gemini pdf Choosing a Spectrometer pdf Tell me more Request Product Information Single Box Direct Drive Double Grating Monochromator. Features of the Gemini-180 Double Monochromator 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 Why Use A Double Monochromator? Reduces Stray Light Prevents Internal Reflections Focal length 180mm Aperture Ratio f/3.8 Resolution 0.15 nm Dispersion 1.77 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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