The ACLP-3 focusable line projector is designed to change a round, low divergence, Helium Neon laser beam to a high divergence , thin plane of light. Unlike a simple, cylindrical lens line projector, the ACLP-3 series employs an optical system that permits the user to focus the projected light plane to a minimum thickness at any distance within its range.

The focusing feature offers flexibility in adjusting light brightness and edge sharpness. A natural laser beam has gaussian intensity distribution. This means that the laser beam is brightest in the center, with the intensity decreasing toward the outer perimeter. As the beam passes through the optical system, the gaussian intensity distribution is maintained across the line width and along it s length.

The focusing mechanism, like that of a photographic camera, does not rotate the lenses. This maintains the position of the projected line during focusing. The optics are anti-reflection coated for maximum transmission efficiency in the visible spectrum. A selection of optics is available for optimizing line intensity and divergence.

TECHNICAL DATA

Part number	186
Expansion ratio	5X
Optimum wavelength	633 nm Helium Neon
Entrance aperture	6 mm dia
Exit aperture	10 mm dia
Optimum beam diameter	0.8 to 1.0 mm
Focusing range	1 meter to infinity
Transmission	approximately 95%
Mounting	1-32 TPI male thread
Dimensions	1.5 dia x 3.0 long inch (38 x 78 mm)

RANGE	SPOT SIZE
0.3 m (1 ft)	0.25 mm (0.010 inch)
1 m (3 ft)	0.33 mm (0.013 inch)
3 m (10 ft)	0.76 mm (0.030 inch)
7.6 m (25 ft)	2.5 mm (0.10 inch)
Line thickness divergence beyond 25 ft is approximately 0.02 degrees.