Features

1-to-1 Micrometer-to-Slit Width Adjustment
Slit Centered to SM05-Threaded Through Hole
Slit Size: 0 to 6 mm
SM05 Threading for Integrating Lens Tubes

The VA100 (formerly VS100) mechanical slit provides precise adjustment of two hardened stainless steel blades centered equally about an SM05-threaded through hole. Each blade is black to reduce unwanted reflections. The unique design of this mount provides a 1-to-1 correlation between the adjustment of the precision micrometer drive and the subsequent change in slit width. The actual slit width ranges from fully closed to 0.25" (6 mm) wide. In the fully closed position, the two blades are touching, however imperfections in the blades and the degree to which the blades are parallel can cause gaps as large as 0.001" (25 µm) in width. The slit opening remains centered on the SM05-threaded aperture as the slit width is varied. The slim overall profile of the mount makes it ideal for use with compact optical assemblies. A bottom-located #8-32 (M4) mounting hole is compatible with our standard 1/2" TR mounting posts. The through hole is SM05 threaded, which is used across an array of Thorlabs products including mounted optics, lens tubes, and our 16 mm cage system.

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Posted Comments:
Poster: apalmentieri	Posted Date: 2010-03-24 11:42:32.0
A response from Adam at Thorlabs: Due to the current design of the VA100, it is not possible to add stepper motors to this product. The main body is only 0.380" thick so the hole cannot be opened up to 0.375" to accommodate the 3/8" barrel of the ZST6B. I believe that this is a good new product idea and will suggest this to our opto-mechanical engineering team as a customer-inspired idea.

Poster:	Posted Date: 2010-03-23 19:57:51.0
is it possible to have this motorized using one of your 1/4-80 stepper motors?

Poster: technicalmarketing	Posted Date: 2008-01-29 13:19:36.0
According to an estimate made by Thorlabs Technical Support Staff, the distance between the sets of slits would be ~4.36 mm. Thank-you for the interest in our product and please contact us if you have any further questions.

Poster: sclarke	Posted Date: 2008-01-28 19:10:57.0
Hello, How far from the face are the blades in the VS100? I need two adjustable slits - one x and one y - as close to the same plane as possible. If the removable plate from two VS100 were removed and the two parts placed right against each other, how close would the two sets of blades be? Thanks Steve Clarke Los Alamos National Lab

Poster: acable	Posted Date: 2007-10-15 20:37:35.0
Tried to find this page by searching on adjustable slit, then variable slit, then i used slit but then had to guess that mechanical slit was the right choice in the large number of options given in response to the last query. The reason why i wanted to find the product page was to understand the minimum slit width, the presentation says fully closed, could you clarify what you mean by this less than precise term.