Optical Filters

Filters are manufactured into a number of shapes and sizes. Filters can be used to pass or eliminate bands of wavelength ranging from hundreds of nanometers in size down to a single wavelength.

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Equipment

Heat Control Filters from Newport Corp.

Hot mirrors are heat-reflecting mirrors/filters designed to transmit visible wavelengths while reflecting near-infrared, heat-generating wavelengths. Cold mirrors are heat-transmitting mirrors/filters designed to reflect visible wavelengths while transmitting near-infrared wavelengths. These filters can be used to remove heat from an optical system. Hot mirrors are offered for 0° angle of incidence, while cold mirrors are available for 45° angle of incidence. They are both available in 25.4 mm diameter and 50.8 mm square sizes.

Neutral Density Filters - Gelatin Type - from Knight Optical

Neutral Density filters attenuate light by a constant amount that is, to first order, independent of the wavelength.

OF2 Series Absorbing Glass Optical Filters from Ocean Optics

Schott glass filters from Ocean Optics contain colored substances that absorb light energy in certain regions of the spectrum.

IR Longpass Filters from Lake Shore Cryogenics

Lake Shore’s product line of mid- and far-infrared (IR) long-pass filters is based on porous silicon technology. The unique patent pending all-silicon design has superior thermal and mechanical properties, even at elevated and cryogenic temperatures, and delamination will not occur under difficult conditions.

Colour Filters - Glass Type - from Knight Optical

Glass colour filters also known as Colour Glass Filters are polished sheets of special glass that have been cast with a dye included in it. Colour Glass Filters generally are relatively cheap and very stable.

Sheet Polarisers-UV and IR Range - from Knight Optical

Our UV and IR sheet polarisers extend the spectral range down to 280nm for the HNP’B types, and out to 2000nm for the type HR’s.

Photon etc LLTF Contrast VIS-2 - Tunable Filter for Fluorescence and Raman Spectroscopy

LLTF Contrast VIS-2 Laser Line Tunable Filter from Photon etc is a novel optical filtering technology that is suitable for tunable excitation sources in fluorescence and Raman spectroscopy.

Andover Standard Bandpass Filters

Andover offers one of the most extensive listings of standard "off-the-shelf" interference filters in this industry. Wavelengths range from the ultraviolet through the near infrared and include many of the primary laser, mercury, biomedical and analytical spectral lines. Standard sizes include 12.5mm Ø, 25.0mm Ø and 50.0mm Ø. Square filters are only available as custom items and will be quoted upon request.

Terahertz and IR Band Pass Filters from Lake Shore Cryogenics

Each filter has a full transmission profile. Full width half max bandwidth (FWHM) and measured centre wavelength are included. These filters are particularly designed for applications requiring high consistency and precision, especially when used in extreme conditions.

XSR Solarization Resistant Optical Fiber from Ocean Optics

Ocean Optics presents Xtreme Solarization-resistant Optical Fiber and Probe Assemblies for spectroscopy.

LVF-Series Linear Variable Filters from Ocean Optics

Ocean Optics has combined its patented high-pass and low-pass Linear Variable Filters to produce the world's first notch filter with an adjustable center wavelength and adjustable bandpass.

Universal Position Controls PS 90 from OWIS

The OWIS PS 90 is a universal modular designed position control, flexibly configurable according to the application field. It is a powerful device which can control maximum nine axes, devided in two groups of each three axes. Thus, three 2-phase step motors or three DC motors (brush and brushless) can work together.

Interference Band-pass Filters from Knight Optical

Knight Optical Supply classic interference filters which pass light of a narrow bandwidth/ wavelength and reflect/ block all other light. In principle interference filters can be designed and manufactured to almost any specification of centre wavelength and band pass.

Colour Filters from Knight Optical

Knight Optical’s colour filters are supplied in various materials, suitable for a range of applications. Their stock colour filters are supplied in the following forms: Colour Glass; Acrylic; Polyester; Wratten Gelatin

FHS-UV In-Line Filter Holder from Ocean Optics

The Ocean Optics FHS-UV In-Line Filter Holder is a low-cost spectrophotometric accessory for fast and convenient absorbance/transmission measurements of optical and other filters.

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