Beijing Delfa have the capability to ensure that all of our products quality are reliable and consistent because we have the high-teach staffs, consummate and scientific management system, advanced manufacturing equipments and inspecting instruments, using commonly standard for testing quality.
Delfa can supply products with different precision according to customer’s request:
Surface Power (waves @633nm)
Surface Irregularity (waves @633nm)
Surface Flatness (waves @633nm)
Length & Width (mm)
Clear Aperture (%)
Contrition (edge thickness difference, mm)
Angle tolerances [prisms] (degrees)
Machine & Equipment Capacity
Quantities & Types
Precise optical polishing/30 sets
Vacuum coating machine/ 5 sets
1.Horizontal Interferometer and FUJINON interferometer
2. Pekin-Elmer lambda 900
3. Pekin-Elmer 983 IR spectrophotometer/Thickness Gage/
4. Trioptics’ OptiCentric controls centeration
5. Universal tool microscope
-We use interferometer or tooling to measure radius of curvature.
-We use interferometer to certify your test plates for radius and irregularity.
-We have fringe analysis software (Chinese made).
-Our standard coatings is AR coating from 400-1000nm and IR AR coating from 3-5um, 8-14um.
-We perform Mil standard on your coatings.
-We can design and coat custom multilayer coatings.
-Our cementing capabilities is double and triple.
-We use AQL 0.65 to judge the size of defects found in surface quality inspections.
Beijing Delfa is making single and bonded reticles for customers. Please contact us for more details.
Beijing Delfa is making coated aspherical lens. The material can be Germanium, ZnSe, ZnS, etc. Please contact us for more details.
Beijing Delfa started to make mass production of OEM optical encoders for customers world wide.