- #1
Desh627
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I have a bk7 prism (borosilicate...) and I'd like to polish it to a 4020 scratch surface rating. How would I go about doing this?
Polishing a BK7 Prism to 4020 Scratch Rating
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SUMMARY
The discussion focuses on polishing a BK7 prism to achieve a 4020 scratch surface rating. Participants confirm that using wet sandpaper with an appropriate grit is essential for this process. They reference specific resources, including Optical Technologies for scratch-dig ratings and CIDRA Precision Services for material specifics. The consensus is that fine grit wet sandpaper will effectively polish the BK7 prism to the desired standard.
PREREQUISITES- Understanding of optical materials, specifically BK7 borosilicate glass.
- Familiarity with scratch-dig ratings in optical components.
- Knowledge of polishing techniques using wet sandpaper.
- Access to grit conversion charts for sandpaper.
- Research the specific grit requirements for achieving a 4020 scratch rating.
- Explore techniques for polishing optical glass using wet sandpaper.
- Review the resources provided by Optical Technologies and CIDRA Precision Services for additional insights.
- Investigate other polishing compounds suitable for BK7 glass.
This discussion is beneficial for optical engineers, glass polishers, and hobbyists working with BK7 prisms who aim to achieve high-quality surface finishes.
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