Laser Diode Collimators transform the divergent light of a laser diode into a collimated beam, while maintaining the Gaussian intensity distribution and the intensity profile of the laser diode. They differ in max. diameter of the collimated beam and in their outer diameter (Ø 12 mm for series 25CM/29CM and Ø 25 mm for series 55CM/55CR and 90CM/90CR).
25CM/29CM vs. 55CM, 90CM and 95CM
The Laser Diode Collimators all have a Gaussian intensity profile. The 25CM, 55CM/55CR and 90CM/90CR produce collimated beams with Gaussian beam profile while maintaning the intensity profile of the laser diode - in this case elliptical. The maximum beam diameter available is smallest for the series 25CM and largest for series 90CM/90CR.
Electronics
The laser has integrated electronics for control of the laser output power. The output power can be controlled using the modulation input ports (TTL and analog) or manually using the potentiometer. Optionally the lasers can be equipped with RS232 serial interface for laser control and data read-out. Please note that the electronic features are different for the compact series 25CM.
Adjustment of collimation settings
The collimation can be adjusted by using a hex key for series 55CM/55CR and an eccentric key for series 25CM/29CM, 90CM/90CR and 95CM/95CR. Please note that this affects beam parameters like collimated beam diameter and beam divergence.
Optional: Low Noise Version
The laser series 55CM/55CR, 90CM/90CR as well as 95CM/95CR are also available as a Low Noise version LNC-56CM/LNC-56CR, LNC-91CM/LNC-91CR and LNC-96CM/LNC-96CR. These lasers are low noise(typ. < 0.15 % of Po* (RMS, Bandwidth < 1 MHz)) and operate mode-hopping free. Due to the reduced coherence length the speckle contrast is lowered. However this effect is smaller for smaller beam diameters. (* Po is the maximum specified output power.)
These high quality lasers can e.g. be used for machine vision applications.
