Category: blog

long wave ir optics

Long Wave Infrared Optics

The infrared spectrum is much broader than that of the visible spectrum.  The graphic in figure 1 illustrates that the spectral range of the MWIR is 6.5 times as broad as the visible, and the LWIR is 20 times as broad.  Color correction is thus needed over a much larger range of wavelengths, and materials are required that cover a broader spectral band than normal glasses.

long wave ir optics

By taking into account the erratic optical dispersion, optical materials can be combined to create a single refractive lens system for imaging across the visible to long wave IR , or disparate subsections within this range.

Long Wave Pass Filters comprise single and boxed set. These filters are made using IR substrates such as silicon, sapphire, germanium, IR quartz etc. with thin films of material that have differing refractive indices and thickness to achieve very shape cut-on at required wavelength in the Infrared region. The filters are used to block the short waveband and transmit the long wavelength and therefore serve to remove any non-required wavelengths and transmit the required ones. These filters can help with reducing the noise and thus improve the signal to noise ratio. They can be used in combination with the short wave pass filters to form a band pass filter. This combination can have variable bandwidths that are tuned by the use of different long and short pass filters.

Call PFG technical sales team and discover how PFG Optics IR Long Wave Pass Optical Filters and service can improve your instrumentation.

laser optics

Laser Optics

Laser Optics are optical components designed for use with lasers or within laser systems. Laser Optics manufacturing often feature damage thresholds that are compatible laser optic manufacturingwith certain laser types. Laser Optics utilize specific substrates, coatings, or a combination of the two to achieve high performance at designated laser wavelengths. Laser Optics includes optical components such as optical lenses, optical filters, optical windows, or mirrors that have been optimized for transmitting or reflecting lasers.

Laser Optics are utilized across automotive, commercial, medical and military industries.

PFG has specialized in manufacturing standard and custom laser optics for many generations. Optimized for all the most common laser systems including CO2, Fiber, PFG coating technology assures the highest damage thresholds and transmission. Laser optics include focusing lenses, high power and super flat mirrors, protective windows, output couplers, and high damage threshold coatings.

 

custom optics coatings, lense manufacturing

Polarizer Coatings

We offer a wide selection of products, including: high precision lenses, prisms, mirrors, windows, filters, polarizers and beamsplitters, coated and assembled to your specifications.


  • Polarizers - Polarizer - Polarizing Filters

Polarizers – Polarizer Coatings

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.

Human eyes have no ability to perceive the polarization of light. Also, the most of the optical detectors do not carry sensitivity of the polarization. For this reason, filters that selectively transmit the light with specific polarization or optics that can change the polarization state become necessary. Custom designs need not be more expensive than standard coatings. In many cases a simple modification to a standard coating design can greatly enhance performance on your specific application at little or no additional cost. Sometimes, however, applications require new and innovative coating designs to meet the task.

optical wedges

Custom Optical Wedges

Custom Optical Wedges & Prisms – PFG Optics

The term “optical wedge” refers to any shallow angle between two plane surfaces of a window. This wedge may range from a few millionths of a degree of perfect parallelism to as much as three degrees of angle. Even though high-precision optics, such as optical Custom Optical Wedgesflats, may be lapped and polished to extremely high levels of parallelism, nearly all optics with parallel faces have some slight wedge. This margin of error is usually listed in minutes or seconds of arc. Windows manufactured with an intentional wedge are often referred to as wedge prisms, and typically come with wedge angles of one, two, or three degrees. Many applications exist for optical wedges, including laser-beam steering, rangefinding and variable focusing. Wedge prisms can be used individually to deviate a laser beam a set angle, or two wedge prisms can be used together for beam steering applications.

Custom optical wedges are used to reflect or refract light at precise angles, our prisms and wedges are made from any optical glass, filter glass or fused silica and can be coated to your exact specifications.

 

PFG Optics is a custom manufacturer of precision flat-surfaced, parallel and custom optical wedges specializing in optics polishing, continuous pad & pitch polishing, CNC machining and laser machining. High volume to prototype products include wafers, windows, filters, mirrors, optical flats, wedge prisms, light pipes, plate beamsplitters, and coatings.

Imaging Optics

Imaging Optics ManufacturingImaging Optics

Optical imaging describes various imaging techniques using visible, ultraviolet, and infrared light used in imaging.

Because light is an electromagnetic wave, similar phenomena occur in X-rays, microwaves, radio waves.

Imaging Optics are used to view objects in a variety of industries and vastly in the medical field. Imaging Optics are used in imaging systems to focus an image of an examined object onto a camera sensor. Imaging Lenses can be used to remove any altering error or provide adjustable magnifications, focal lengths, or field of view. Imaging Optics allow an object to be viewed in several ways to illustrate certain features or characteristics.

PFG Optics in-house engineering, manufacturing, and quality expertise, PFG designs products that transfer seamlessly to our production process.  In doing so, we avoid common pitfalls of working with disparate design firms and contract manufacturers, giving you the benefit of:

  • Shorter time to market
  • Cost effective design
  • Responsive product development

For a custom design quote, please contact one of our engineers at 228-875-0165 x200 or sales@pfgoptics.com

Precision Optical Components

At PFG Precision Optics our first priority has always focused on advancing technical competence to provide superior precision optical components to our customers. We produce a broad offering of very high precision spherical and flat optics, together with an extensive variety of durable long lifetime thin film coatings and opto-mechanical assemblies. Historically our core strength has been production of visible and shortwave infra-red optics for the defense, semiconductor, medical, scientific and test & measurement industries. In recent years our competencies have broadened into the deep UV and out to the mid-wave IR wavelengths.

Our capability is not just the equipment and tooling we have but it’s also what our engineers and operators can do with that equipment – coating, fabrication and metrology. At PFG we have extensive equipment that allows us to produce the variety of high precision optical components our customers need. Our technicians use mills, grinders, spindle polishers, double sided polishers; CNC mills, polishers and edgers; MRF polishing, automated cleaning equipment, e-beam and IAD coaters, spectrophotometers and interferometers.

precision optical components

defense optical components

Defense Optics

Manufacturing Defense Optics to not be seendefense optics

PFG Optics has been manufacturing Defense Optics for many years. There is a wide range of defense optics including:

  • Infrared filters for soldiers to use tactical illumination in combination with night vision.
  • Laser optics used in high energy applications such as nuclear defense.
  • Night vision optics
  • Variety of lenses such as aspherical and other high-quality that reduce weight and used in surveillance devices
  • Optical glass for fingerprint and retinal scanning devices
  • Anti-reflective coatings for any optic without compromising performance

Defense Optics are ideal for integration into a variety of applications within the defense or security industries. Defense Optics consists of a wide range of optical components, such as optical lenses, laser windows, laser prisms, or optical testing tools.

PFG Optics offers custom precision optical components. PFG Lenses are available in a range of substrates or with a variety of anti-reflection coating options. PFG Prisms are designed to reflect light at fixed angles. PFG Beamsplitters are designed to split incident light into two beams, determined by wavelength, intensity, or polarization state.

For more information contact one of our engineers at (228) 875-0165

Optical Thin Film Coatings

Optical Thin Film Coating

Optical Thin Film Coating – PFG Optics

PFG Optics thin-film optics is the branch of optics that deals with very thin structured layers of different materials.In order to exhibit optical thin film coating, the thickness of the layers of material must be on the order of the wavelengths of visible light. Layers at Optical Thin Film Coatingthis scale can have remarkable reflective properties due to light wave interference and the difference in refractive index between the layers, the air, and the substrate. These effects alter the way the optic reflects and transmits light. This effect, known as thin-film interference, is observable in soap bubbles and oil slicks.

In manufacturing, thin film layers can be achieved through the deposition of one or more thin layers of material onto a substrate (mostly glass). This is most often done using a physical vapor deposition process, such as evaporation or sputter deposition, or a chemical process such as chemical vapor deposition.

Thin films are used to create optical thin film coating.

laser optics

Laser Optics Manufacturing – production of high quality precision optics

Laser Optics are optical components designed for use with lasers or within laser systems. Laser Optics manufacturing often feature damage thresholds that are compatible with certain laser types. Laser Optics ManufacturingLaser Optics utilize specific substrates, coatings, or a combination of the two to achieve high performance at designated laser wavelengths. Laser Optics includes optical components such as optical lenses, optical filters, optical windows, or mirrors that have been optimized for transmitting or reflecting lasers.

Laser Optics are utilized across automotive, commercial, medical and military industries.

PFG has specialized in manufacturing standard and custom laser optics for many generations. Optimized for all the most common laser systems including CO2, Fiber, PFG coating technology assures the highest damage thresholds and transmission. Laser optics include focusing lenses, high power and super flat mirrors, protective windows, output couplers, and high damage threshold coatings.

 

polarizers-1a

UV Optics – Manufacturing Ultraviolet Optics

Ultraviolet light is light with a wavelength shorter than ≈ 400 nm, the lower limit of the visible wavelength range.UV Optics Manufacturing

For handling UV light, special UV optics are required. Important material parameters for UV applications are a low bubble and inclusion content, good homogeneity of the refractive index,  and the potential for polishing surfaces with very small roughness.

Some optical fibers can be used in the near-ultraviolet spectral region, although with relatively high propagation losses. Fiber delivery of ultraviolet light is usually not feasible for shorter wavelengths and/or high optical powers. Due to this limited reflectivity, Ultraviolet optics have to be designed with the smallest possible number of reflecting surfaces.

Proper manufacturing ultraviolet optics techniques and close attention to cleanliness are required to make the best UV optics possible. If improper grinding or polishing techniques are used, there is a potential for the substrate to have roughness and possible micro-fractures. The visual inspection of the substrate surfaces may look good, but when UV coatings are applied, a typical outcome is grazing or micro-fractures in the coating.