Custom Precision Prisms for Optical Systems - Glass Perfection

Every project is different. That’s why we offer complete custom optical prism design and manufacturing, including:

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• Material selection based on wavelength and performance needs

• Customised coatings (AR, HR, beamsplitter coatings)

• Tight dimensional and angular tolerances

• Prototype, low-volume, or high-volume production

• Certificates of Conformity and rigorous QA testing

Speak to our team about your specifications and let us design an optical prism solution that fits your project.

The company is the world’s best Custom Optical Prisms supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

At Glass Perfection, we offer a full end-to-end optical prism manufacturing service, from concept to delivery. Whether you’re developing a new system or refining an existing design, we support your project at every stage:

• Design Consultation: Collaborate with our team to define performance goals, tolerances, and geometry.

• Prototyping & Testing: Rapid prototypes available to validate your design before committing to production.

• Advanced Manufacturing: We use precision grinding, polishing, and coating techniques to achieve outstanding angular accuracy and optical clarity.

• Scalable Production: Suitable for R&D, low-volume specialist runs, or ongoing bulk supply contracts.

All manufacturing takes place in our UK facility, ensuring rapid turnaround, tight quality control, and full traceability. Each component is delivered with certification and expert support.

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I've pasted part of an artical I wrote for a trade rag a few years ago...

P² = H ² +V ² √

P² is the amount of resultant prism
“H”is the horizontal prism amount
“V”is the vertical amount
√ is square

If you are not familiar with a scientific calculator, I’ll give you a step by step example; O.S. 5 out and 3 up. Use these buttons on your calculator..

5 x² + 3 x² = √

Your calculator should say 5... This is the amount of resultant prism. Now,along what axis does it go? The formula for the prism meridian (axis) is;

Tan ‾¹ = V/H

Example; (Use these keys in their order)

3 ÷ 5 =Tan‾¹

Your calculator should say 30.963…

So the final Rx checked on the O.S. Should be 5.8 diopters of prism @ axis 31. Keep in mind the direction of the requested prism in relation to which lens you are neutralizing. If the above prism amounts were on a right lens, an axis of 31 would be up and in. ( wrong direction!) In such cases you inverse the axis from 180.
(i.e. 180 – 31 = 149 )

These same formulas and procedures are used when applying Fresnel prisms. I believe the resultant prism would be about 8.54 base in and down. As Braheem24 pointed out the 8.54 is the resultant vector of 8 and 3. The base axis would be 339 in the right and 201 in the left. The base axis is not 45 but cos x= 8/8.54 or about 21 degrees. 360-21=339 OD and 180 +21=201 OS As a side note I would also think the 3 BD OU would cancel out and the net effect prism would simply be 8.0 BI OU. But that's how you would do it with single Fresnel if you didn't want to surface the prism. As a personal note fresnel prism has a very poor patient acceptance rate due to cosmesis as well as acuity loss.