OSS-30C 30 mm Cage-Style Adjustable Slit

Product Description

• Slit width adjusted via micrometer
• Slit width range: 0~4.5 mm
• 1:1 correspondence between micrometer and slit width adjustment, 10 μm graduation
• Slit centered on SM05 (0.535″-40) threaded hole
• Mountable vertically or horizontally to 30 mm cage systems

The two blades of the OSS-30C width-adjustable slit move uniformly inwards or outwards along the SM05 threaded through-hole, ensuring the slit opening remains symmetrically centered on the SM05 threaded hole at all times.

 

Specification	OSS-30C
Dimensions	55.8×36.0×9.9 mm (excluding adjuster)
Slit Width	0~4.5 mm
Micrometer Precision	0.5 mm per revolution, 10 μm scale graduation
Central Aperture	SM05 (0.535″-40) internal thread
Threaded Hole Type	1×M4 threaded hole
Weight	60.6 g
Material	7075 Aluminum Alloy

Technical Description

(1) The two blades of the OSS-30C width-adjustable slit move uniformly inwards or outwards along the SM05 threaded through-hole, maintaining the symmetrical centering of the slit opening with the SM05 threaded hole center. The slit housing is designed with four 4-40 threaded holes for easy mounting to 30 mm cage systems. During installation, the slit can be easily positioned vertically or horizontally to meet different experimental requirements.

(2) The slit width ranges from fully closed to 6 mm and is adjusted by a micrometer drive, with a 1:1 correlation between the micrometer reading and the actual slit width, and 0.5 mm of adjustment per revolution. When fully closed, the two blades should make contact; however, due to blade imperfections and limitations in blade parallelism, a maximum gap of 0.25 μm may exist (this minor deviation does not affect precision requirements in most applications).

(3) The base of the slit is designed with an M4 mounting hole, which makes it compatible with optical posts and facilitates fixation to a variety of optical setups.

Assembly

Application Examples

Engineering Drawings Download

OSS-30C Engineering Drawing