RETRA® light engine

Lumencor’s RETRA light engine is designed for laboratory use by bioanalytical researchers and/or developers of bio-optical instrumentation. The RETRA incorporates two individually controllable solid state light sources with associated bandpass filters, producing spectrally discrete outputs. Spectral outputs can be situated from the ultraviolet through the visible to the near-infrared, according to application-specific requirements. For example, the RETRA FURA light engine provides 340 nm and 380 nm outputs for fura-2 ratio calcium imaging. The RETRA light engine can be controlled by serial commands for on/off switching and intensity control or by TTL triggering for source selection and on/off switching.

RETRA Light Engine Features



RETRA has two independently controlled solid state light sources.



Source output spectra refined using integrated bandpass filters


Control Interface

Serial: control of source on/off and output intensity.

TTL: Independent on/off for each color channel.




Maximum 10 kHz channel switching



200-700mW per source color channel (dependent on filtering)


Light Delivery

Liquid light guide (LLG) or optical fiber



24 months to the end user



RETRA: 4.2 kg


145 mm x 190 mm x 203 mm


Power Requirements

220W (24V DC/ 9.2A) power supply included with light engine


Maintenance Free

No replacement parts, fully pre-aligned, no routine maintenance



Low power consumption, mercury-free

14940 NW Greenbrier Parkway | Beaverton, OR 97006 USA | 503.213.4269 |