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Infrared filter & coating (custom mid-infrared bandpass filter)

Infrared filter & coating (custom mid-infrared bandpass filter)

At Andover, we design and manufacture bandpass filters according to your specified requirements.

■IR Broadband AR Coating - AR Coating: 2–14μm, Germanium - Size: 25mm / 50mm - Wavelength: 2000nm–14000nm (Broadband compatible) ■IR Bandpass Filter - Standard products are available, as well as custom wavelength bandpass filters tailored to your needs - Substrate: Sapphire / Germanium - Wavelength: 2000nm–14000nm (Broadband compatible) ■IR Windows & Substrates - Substrate: Silicon / Germanium / Sapphire / Fused Quartz, etc. - Size: 25mm / 50mm - Wavelength: 2000nm–14000nm ■IR ND Filter - Metallic coated infrared ND filter (metal coating processed on Germanium substrate) - Attenuation effect for broadband spectral sources - Size: 25mm / 50mm - Wavelength: 2000nm–14000nm *9-piece ND filter set available (including storage box)

  • Other optical parts

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ND Filter

ND Filter

Andover Corporation manufactures metal coatings and absorptive ND filters.

■Metallic ND Filter - Optical density is achieved by depositing a metal alloy onto a substrate selected for the desired wavelength range. ■Absorptive ND Filter - Manufactured using Schott NG glass, it strictly relies on the absorption effect of the glass to achieve the desired attenuation level. *These ND filters are also available for sale as a set. *All sets come with a storage wooden box.

  • Other optical parts

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Edge filter (long pass / short pass)

Edge filter (long pass / short pass)

The Edge Filter is referred to as a Long Wave Pass Filter (LWP) / Short Wave Pass Filter (SWP).

■Used for separating the wavelength bands that transmit at specific wavelengths and those that reflect. ■These edge filters shift the edge wavelength bands slightly depending on the angle of incidence, allowing for the adjustment of the cutoff wavelength by utilizing this principle.

  • Other optical parts

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Dichroic Filter

Dichroic Filter

Dichroic filters (color separation filters) are used in many applications that require the isolation of a range of visible light.

- More general applications include color enlargers and copiers as optical balance filters. - It may also be useful for applications where it is desirable to separate incident energy from two or more light beams. - The spectral curves below are displayed at normal incident angles, but for many applications that involve combining colors, it is preferable to use them in reflection mode at an incident angle of 45°. - The stringent manufacturing of these filters utilizes durable insulating films that show no degradation over years of use. - They are characterized by being very stable, with minimal efficiency loss over time.

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UV filter

UV filter

Inrad Optics original products

■Stable at high temperatures ■Compatible with large sizes (diameter: up to 38mm / thickness: up to 50mm) * Inrad also offers custom solutions based on customer specifications, in addition to standard products. * We handle everything from manufacturing and processing to delivery according to customer requests. * Please feel free to contact us.

  • Glass
  • Other physicochemical equipment

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Fiber Coupled Acousto-Optic Tunable Filter (FCAOTF)

Fiber Coupled Acousto-Optic Tunable Filter (FCAOTF)

Fiber coupled acousto-optic tunable filter (AOTF)

■Supports a wide wavelength range (1000–1200nm / 1250–1350nm / 1500–1600nm) ■By adjusting the RF frequency and intensity, filtering can be performed quickly and accurately with a resolution of 2nm or more ■Polarization Maintaining Fiber (PMF) ■Wide range spectral color filter

  • Laser Components
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Astronomy uses UBVRI filters.

Astronomy uses UBVRI filters.

Two types: Johnson/Bessel and Kron/Cousins.

■Andover provides UBVRI filters as standard products. ■These filters are used to remove light emitted from celestial bodies or to measure specific bands. ■Johnson/Bessel: Photomultiplier tube ■Kron/Cousins: Silicon CCD

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Acousto-Optic Tunable Filter (AOTF)

Acousto-Optic Tunable Filter (AOTF)

Spatial input-output type acousto-optic tunable filter (Fiber coupled AOTF)

■Custom adjustments can be made over a wide wavelength range beyond the standard tuning wavelength ranges of 400–1000nm, 900–1700nm, or 3000–4500nm. ■By adjusting the RF frequency and intensity, filtering can be performed quickly and accurately with a resolution of 2nm or more.

  • Laser Components
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Manual Type Variable Bandwidth Optical Filter XTM-50

Manual Type Variable Bandwidth Optical Filter XTM-50

◆Simple operability using a traditional rotary dial from previous years ◆Compact housing for laboratory use with a variable bandwidth tunable filter

- Bandwidth-variable flat-top filter - Steep slope: 800dB/nm - High isolation: 60dB (typ) - High wavelength accuracy and reproducibility - Ultra-narrow linewidth; high selectivity (32pm to 5nm) - Tuning range: 1260 to 1650nm - Bandwidth: 32pm to 5nm - Analog bandwidth-variable tunable filter

  • Other measurement, recording and measuring instruments
  • Other physicochemical equipment
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Electric Variable Bandwidth Optical Filter XTA-50

Electric Variable Bandwidth Optical Filter XTA-50

◆Wavelength resolution of 1 pm. Simple operability using a touch panel display. ◆Laboratory-use variable bandwidth tunable filter.

- Variable bandwidth flat-top filter - Steep slope: 800 dB/nm - High isolation: 60 dB (typ) - High wavelength accuracy and reproducibility - Ultra-narrow linewidth, high selectivity (32 pm to 5 nm) - Tuning range: 1260 to 1650 nm - Bandwidth: 32 pm to 5 nm - Analog variable bandwidth tunable filter

  • Other measurement, recording and measuring instruments
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