Optical Flats, Dual Precision Surface
Category: Optical Flats
Optical Flats are most commonly used as test plates to evaluate the accuracy of unknown optical surfaces. Esco manufactures optical flats out of G1 grade fused quartz; the low thermal expansion, abrasion resistance and general stability of this material allows continuous use with minimal degradation over time.
Esco offers optical flats with either one or two precision surfaces. Customers can test flat optical surfaces by holding the precision of an optical flat against the test surface. When placed under a monochromatic light, a fringe pattern can be seen through the back surface of the flat. This pattern describes the contour of the test surface, and is not affected by the accuracy of the rear surface.
Ready to check out
Review the selected option and total at checkout.
Delivery to you
Allow time for the store to prepare your order before transit begins.
Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
View policyTalking through a refund
Send the store your order number and the reason for your request.
Please contact us for the refund processing timeframe before returning an item.
View policyYour shipping options
Choose from the delivery options available for your address.
Standard Shipping · United States: $0.00
Express Shipping · United States: $3.99
View policyBefore you return a product
Check the conditions for your product before sending it back.
United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.
View policy