PDS 400™ Variable Wavelength Generator


The PDS 400™ Variable Wavelength Generator delivers a narrow band of visible wavelengths (pure rainbow colors) through two fiber-optic cables. It can selectively output any wavelength between 410 and 700 nm and frequency from 0 to 400Hz. The device can sweep between two wavelengths or continuously output a narrow band of wavelengths.


Output from the PDS 400™ light source can remain constant, like a laser or LED, or continuously vary.

PhotoMed's Rapid Discovery System™ provides precise control of wavelength, pulse frequency, brightness, and other parameters.


The PDS 400™ Generator can help you explore wavelength-dependent phenomena in vitro as well as in vivo. What would you like to discover?


An "ordinary" daffodil illustrates nature's exquisitely fine gradients in color absorption. The PDS 400 generator output was stepped in 1nm increments from 480 to 580nm. Changes at each step can easily be observed using a true black and white camera. Darker means that more light is being absorbed.


Updated: April 2, 2018



PhotoMed Technologies is a dedicated to finding non-invasive solutions to chronic pain and functional impairments.

Founded and funded as our family mission to help people with no path forward. We appreciate your donations and support.

Allan Gardiner


New Frontiers

PhotoMed's methods and equipment open new areas for pain, biophysics, physiology, neuroscience and other areas of research.

How can PhotoMed's team help you advance your mission?



PhotoMed Technologies envisions a future when collaborating clinics, including those rural and remote, can offer their patients the most current non-invasive solutions developed by passionate practitioners and researchers around the globe.


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Copyright © 2017-2018 · PhotoMed Technologies™, Inc. · All rights reserved

PhotoMed's products are for investigational use only. Methods and equipment may be covered by issued or pending patents.