Diffraction Grating Order

How to use this tool

1. Calculate the diffraction angle and highest possible order for normal incidence.
2. Set groove density, wavelength, diffraction order in the indicated units.
3. Calculate and compare diffraction angle, maximum permitted order.

Try this example

{
  "lines": 600,
  "w": 500,
  "order": 1
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.