OPTICAL COMPONENT CATEGORY
Diffraction Gratings
Diffraction gratings separate wavelengths by directing different spectral components into different angles. This category includes reflection and transmission formats for spectrometers, monochromators, tunable sources, wavelength analyzers and educational optical systems. Ruled and holographic structures offer different stray-light and efficiency behavior, while the chosen operating geometry determines whether the dispersed beam remains on the incident side or passes through the substrate.
Select groove density from the required angular dispersion and instrument focal length, then confirm blaze wavelength or angle, diffraction order, usable spectral range and expected efficiency. Substrate dimensions, clear aperture, flatness, coating and groove orientation must match the mechanical and optical layout. Higher groove density alone does not guarantee higher system resolution; entrance slit, aberrations, detector sampling and illuminated aperture must be evaluated together.
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Diffraction Gratings
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SELECTION QUESTIONS
Diffraction Gratings FAQ
Technical answers to the questions that most often affect model selection.
Should I choose a reflection or transmission grating?
Use a transmission grating for compact in-line layouts and a reflection grating when the diffracted path should remain on the incident side or when a reflective coating and blaze condition are required. Mechanical envelope and wavelength range often decide the format.
How do groove density and blaze affect a grating?
Groove density controls angular dispersion, while blaze angle concentrates efficiency toward a selected wavelength and diffraction order. Higher dispersion does not automatically provide higher system resolution; slit width, focal length and detector sampling also matter.
Which grating data should be confirmed before ordering?
Confirm groove density, blaze wavelength or angle, usable wavelength range, diffraction order, substrate dimensions, clear aperture and expected efficiency. The drawing must also identify groove direction and coated face orientation.
Need a different diameter, tolerance or coating?
Send your material, wavelength, dimensions and quantity for review.
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