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D.W. Mann Co. 20µ Precision Optical Slit Assembly Spectrometer Optical Bench Dovetail Mount
- Auction No.:
- 16303
- Buy Now Price:
- $159.00
- Starting Bid:
- $82.5
- Location:
- Chandler, AZ - United States
- Started:
- 06/06/2026 11:40PM
- Ends:
- 06/16/2026 11:40PM
- Shipping:
- Buyer pays shipping
- Payment:
- Personal or Cashier's Check, Money Orders, Instance Cash Wire Transfer, Cash
- Hits:
- 113
Identification
D.W. Mann Co. 20 Micron Precision Optical Slit
- Manufacturer: D.W. Mann Co., Lincoln, Massachusetts
- Slit width: 20 µm (20 microns)
- Housing size: 3¼” × 3¼” square
- Mount: 2” long dovetail, 5/8” wide × 5/8” high
- Construction: Black anodized aluminum with precision-machined slit blades
What it was used for
This type of component would slide into an optical bench or spectrometer carriage and provide an extremely narrow light source for:
- Spectroscopy
- Diffraction experiments
- Interferometry
- Monochromators
- Laser beam shaping
- University physics labs
- Research optical systems
The 20 µm slit is very narrow—about one-quarter the thickness of a human hair—indicating a scientific/research-grade optical component.
Condition
From the photos:
- Slit appears intact.
- Housing shows normal handling scratches.
- Dovetail mount appears undamaged.
- Engraving is clear and legible.
- Internal slit edges appear clean.
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Dave Schreiner (dachrein1)
Rating: (Not Rated)
Funding Member
