633nm laser beam expander is a precision optical component specifically designed for HeNe lasers and red laser systems, widely used in laser interferometry, holographic imaging, optical experiments, and precision laser marking. This series adopts a Galilean optical design, achieving excellent beam expansion performance in a compact structure.

Optical Performance

This product series is optimized for the 633nm wavelength, featuring broadband anti-reflection coatings (450-750nm) with an average reflectance below 0.6%, ensuring >98% transmission. The transmitted wavefront distortion is better than λ/4 @633nm, achieving diffraction-limited beam quality. Expansion magnifications range from 2X to 20X, with maximum input beam diameter up to 30mm, meeting diverse requirements from basic experiments to high-precision industrial applications.

Mechanical Design and Adjustment

The beam expander features non-rotating optics for divergence adjustment, providing smooth movement. The output beam can be continuously adjusted from collimated state to a minimum focus distance of 1.2 meters while maintaining bore sight accuracy. Input and output ports feature standard SM1/SM2 or C-Mount threads, enabling easy integration with various optical systems. The housing is made of 6061-T6 aluminum alloy, offering excellent mechanical stability.

Typical Applications

633nm laser beam expanders are widely used in: Optical Coherence Tomography (OCT) beam collimation, high-precision laser interferometry, holographic recording and reconstruction, laser marking and engraving, as well as university physics teaching experiments.