Tunable Light Sources

Tunable Light Sources

Our TLS (Tunable Light Source) is a convenient and affordable integration of the Mini-Chrom monochromator and an efficient, power stabilized broadband Tungsten Halogen light source with a variable aperture. The versatile design and options allow the selection of manual or computer controlled versions, several spectral ranges from 360 – 1000 nm, 6 nm, 10 nm, or 25 nm bandpass output, as well as fiber optic input adapters and cables for the output. These tunable light sources are great for laboratory use and have been customized for many OEM applications.

Our Tunable Light Sources are used to maximize throughput in the visible region of the spectrum. They are used to study wavelength dependent chemical, biological, and physical changes or properties. Tunable light sources can also be used in color analysis and reflectivity measurements of products for aesthetic purposes.
By turning the knob on the manual version, or using software control on the motorized version, the grating is rotated to allow only a few nm of light to pass through the exit slit, fiber optic adapter or fiber optic cable. We offer a range of grating choices for our tunable light sources to provide optimum bandpass selectivity and throughput. The lamp used in the TLS series has usable spectral energy between 360 nm and 2000 nm. However, no one grating can give adequate performance over this range.

We offer a wide range of grating choices for its tunable light sources to provide optimum bandpass selectivity and throughput.

The lamp used in the TLS series has usable spectral energy between 360 nm and 2000 nm. However, no one grating can give adequate performance over this range. Optometrics offers versions optimized for the visible spectrum 360 nm to 800 nm and others for the near infrared.

For most illumination applications, passbands of 5 nm or narrower are considered to be high resolution. Passbands of 10 nm or less are rarely needed in colorimetry or photochemistry.

We offer two Tunable Light Source models:

  • TLS-6 with a 6 nm band pass*
  • TLS-10 with a 10 nm bandpass*

*Bandpass assumes the use of the standard included 600 micron entrance slits or the optional fiber optic cable.

Custom slits are available to change the resolution. However, power increases with band pass. Typically users will trade bandpass for throughput, i.e. use the widest band pass possible that will not affect the quality of the measurement.

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