Opto Engineering® - 20 years
Home Lighting LED illuminators
LTCL4K series
Tech Info
Telecentric light

Key advantages

  • Compact design
    “Flat” shape for easy integration.
  • High optical throughput and enhanced depth of field
    When coupled with compatible TC4K telecentric lenses.
  • Dedicated CMMR4K mirrors
    Right-angled deflection of the light path for usage in tight spaces.
  • Homogeneity test report with measured values.
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LTCL4K series is now also available with new LTSCHP1W-GZ green light source, suitable for any kind of sample and specifically tailored for measuring reflective objects and objects with sharp edges.


  1. Reduction of edge diffraction effects.
  2. Enhanced illumination uniformity, especially on large FOVs.
  3. Less sensitive to alignment.

Ordering information

To order the version with the new green LED module use partnumber LTCL4Kxxx-GZ (i.e. LTCL4K060-GZ).

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Last update 03 Aug 2023

Expand table


  1. Beam shape is not circular. See Tech Info for minimun beam dimensions.
  2. Opto Engineering® recommends green light for high precision measurement applications.
  3. Tolerance ± 10%.
  4. At max forward current. Tolerance is ± 0.06V on forward voltage measurements.
  5. In continuous mode (not pulsed).
  6. At pulse width <= 10 ms and duty cycle <= 10%. Built-in electronics board must be bypassed (see tech info).
  7. Nominal value, with no spacers in place.
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Technical documents

Product user guide
LTCLHP manual

Application examples

A LTCL4K back-illuminating a mechanical component and interfaced to a TC4K telecentric lens.

A LTCL4K directly illuminating a sample and serving as a linear telecentric illuminator.

A LTCL4K illuminator coupled with a TC4K lens using a CMMR4K deflecting mirrors to scan samples on a glass surface.

Press & marketing content

Optical solutions for the pharmaceutical/biomedical industry

Tools & Resources

Telecentric lenses tutorial
Telecentric and macro lenses options
TC Accuracy Chart
Image gallery
Video gallery
Frequently asked questions