We offer a wide selection of products, including: high precision lenses, prisms, mirrors, windows, filters, polarizers and beamsplitters, coated and assembled to your specifications.
PFG has extensive lens manufacturing capabilities using all types of optical glasses, fused silica and crystalline materials including CaF2, Ge, MgF2, Si, ZnSe, ZnS and Amtir. We select the best process technology from spindle polishers, CNC polishers, magneto rheological finishing or a combination thereof to produce the required specifications – some subtle such as low spatial frequency, some more obviously beneficial such as low surface roughness – to achieve the required optical performance from a given material. Tight centering, truncation, high included angle or long radii – we use best practices developed from decades-long experience to achieve timely and efficient production. We have a vast library of test plates and many current model Zygo interferometers, all with complete reference spheres for accurate surface measurement.
Optical Flats (Mirrors, Windows, Wedges and Filters)
PFG delivers high performance mirrors, windows and wedges in a wide variety of shapes, sizes and materials. We are accustomed to working with most all optical glasses (100+), fused silica and crystalline substrate materials such as CaF2, Ge, MgF2, Si, ZnSe, ZnS and Amtir. Our technicians are able to produce optical flats to the most demanding specifications for flatness, transmitted wavefront, parallelism (angular tolerances on wedges) and surface cosmetics. Whether using continuous polishers or double-side polishers, we confidently select the optimal process technology, and adhesion and blocking method (pitch, tape/wax or optical contacting) to meet your specifications. Our polishing technicians clearly understand that substrate type, dimensions, blocking method and material, final shaping, aspect ratio and coating, all significantly impact the end result. For wedged optics we have an extensive inventory of tooling, in many instances allowing us to avoid tooling charges and to reduce delivery times to our customers. Coatings range from the deep ultraviolet through the mid-wave infrared. We provide dielectric and metallic mirrors; as well as notch, edge, dichroic, color substrate and neutral density filters.
Since our inception PFG has produced a wide variety of high precision prisms with stringent specifications for angle, flatness, transmitted wavefront, dimension, clear aperture, surface quality and sharp roof. Our current capabilities include right angle prisms, pentaprisms, boresight prisms, delta prisms, porro prisms, pechan prisms, risley prisms, corner cubes, rhomboids and dove prisms. We possess the process technology, tooling, know-how and metrology to consistently deliver superior performing prismatic optics. Substrate material very familiar to us include most all optical glasses, fused silica, Si, ZnSe, ZnS, CaF2, MgF2 and Cleartran.
We offer an extensive variety of tight-toleranced plate and cube, typically polarizing beamsplitters from UV to MWIR in a wide selection of sizes and glass types. Our cube beamsplitters are cemented or chemically contacted high precision right angle prisms with a dielectric coating applied to the hypotenuse. This type of beamsplitter best avoids ghosting. Polarizing beamsplitter cubes split randomly polarized beams into two orthogonal, linear polarized components, S-pol & P-pol, with the S-polarized light reflected at a 90° angle relative to the incident beam while P-polarized light is transmitted. We offer many beamsplitting ratios generally ranging in size from 10mm to 60mm with high extinction ratios.
Through stringent polishing and coating process parameters, PFG is able to produce thin film cube or plate polarizers that deliver an impressive combination of high extinction ratio, high damage threshold, low loss, excellent mechanical durability and long operational lifetime. We produce a variety of polarizers in the ultraviolet, visible and mid-wave IR wavelengths with many split ratios.