Thin Film Coating

Reflecting Mirrors

: Reflection Mirror

Reflecting Mirrors are coated with a metallic film made from materials such as aluminum, silver, and dielectric films. By optimizing the film structure according to the application, reflecting mirrors with reflectance of 99.9% or higher are realized.

Applications
  • Binoculars

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Multi-layer Reflection Mirror

Multi-layer Reflection Mirrors are optical elements designed to achieve high reflectance for specific wavelengths of light by alternately stacking materials with different refractive indices.

Applications
  • Semiconductors/LCD Lithography Equipment
  • Measuring Instruments

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Spectral Characteristics / Specifications

High-Reflectivity Mirrors

High-Reflectivity Mirrors are optical elements that achieve reflectance of 99.9% or higher and reflect light with high precision and minimal loss. Multi-layer mirrors supporting multiple wavelengths have also been developed, realizing reflection with zero phase shift. This enables efficient and stable scanning and detection of multi-wavelength lasers.

Applications
  • Medical Equipment
  • Semiconductors/LCD Lithography Equipment
  • Digital Cameras
  • Microscopes
  • Survey Instruments
  • Measuring Instruments
  • Projectors
  • Acoustooptic Devices
  • Optical Sensors

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Wide Band Reflection Mirrors

Wide Band Reflection Mirrors reflect a specific wavelength band. These are used for laser resonators such as tunable lasers.

Applications
  • Laser Resonators

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Spectral Characteristics / Specifications

Ultra Huge Reflection Mirrors

NITTO OPTICAL can manufacture Ultra Huge Reflection Mirrors with high precision at even in sizes of φ1,000mm and larger.

Applications
  • Large Measuring Instruments
  • Projectors
  • Aviation/Aerospace

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Enhanced Reflection Mirror

Enhanced Reflection Mirrors improves reflectance by applying special processing to ordinary metallic reflection films, improving reflectance. With aluminum reflection films, reflectance of over 95% is achieved. These mirrors are used in optical systems where sufficient light intensity cannot be obtained without enhanced mirrors.

Applications
  • Semiconductors/LCD Lithography Equipment
  • Laser Printers
  • Inspection Equipment

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Laser Mirrors

Laser mirrors are mainly used as high reflection mirrors, and their R (reflectance) can be freely controlled, achieving up to R = 99.9%.

Applications
  • Semiconductors/LCD Lithography Equipment
  • Laser Processing Machine
  • Others (e.g., Measurement Equipment)

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Spectral Characteristics / Specifications

Laser Mirror for Blue Laser

Laser Mirror for Blue Laser (around 405 nm wavelength) is designed using dielectric multilayer coatings. They provide high reflectance and laser durability.

Applications
  • Laser Microscope
  • Mask Writing Tools

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Spectral Characteristics / Specifications

Multi-layer Mirror for Excimer Lasers

Multi-layer mirrors for Excimer Lasers are designed using dielectric multilayer coatings to support ultraviolet wavelengths. They provide high reflectance and laser durability.

Applications
  • Semiconductors/LCD Lithography Equipment

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Spectral Characteristics / Specifications1

Spectral Characteristics / Specifications2

AR Coatings

: Anti-Reflection Coating

AR Coatings are used to suppress approximately 4% residual reflection generated at the boundary between glass and air. By depositing dielectric films, this reflectance can be controlled to 0.5% or less. In optical systems composed of many optical components, reducing residual reflection on each surface is required, and AR coatings play an important role.

Applications
  • Semiconductors/LCD Lithography Equipment

AR Coating for Excimer Lasers

: Anti-Reflection Coating for KrF/ArF Excimer Laser

AR Coatings for Excimer Lasers are designed for the DUV (deep ultraviolet) range, supporting ArF (193 nm) and KrF (248 nm) wavelengths, and NITTO OPTICAL achieves high transmittance and durability.

Applications
  • Semiconductors/LCD Lithography Equipment

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Spectral Characteristics / Specifications

Spectral Characteristics / Specifications2

Cold Mirrors / Filters

The multi-layer dielectric coating on these glass mirrors reflects 90% of visible light while allowing better than 80% transmission of IR range. Cold mirrors are ideal for illumination systems where high temperature lighting is not desired.

Applications
  • Medical Equipment

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Half Mirrors

: Semi-transparent Mirror

Half Mirrors are optical elements that generally split light into a 1:1 transmission/reflection ratio, and in fields such as optical communication and 3D displays, they serve the same function as beam splitters.

Applications
  • Fiber Optics
  • Semiconductors/LCD Lithography Equipment
  • Optical Sensors

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Spectral Characteristics / Specifications

Dichroic Mirrors

Dichroic Mirrors reflect specific wavelengths while allowing other wavelengths to transmit.

Applications
  • LCD/LCOS Projector
  • DLP Projectors

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Spectral Characteristics / Specifications1

Spectral Characteristics / Specifications2

Dichroic Filters

Dichroic Filters transmit only specific wavelengths while reflecting other wavelengths.

Applications
  • LCD/LCOS Projector
  • DLP Projectors

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Band Pass Filters

: BPF(50G/Hz,100G/Hz,200G/Hz)

Band Pass Filters selectively remove specific wavelengths of light. They are compatible with various lasers and preserve a maximum transmission rate.

Applications
  • Medical Equipment
  • Spectroscopic Analysis

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Narrow Band Pass Filters

Narrow Band Pass Filters selectively remove specific wavelengths for DWDM (Dense Wavelength Division Multiplexing) / CWDM (Coarse Wavelength Division Multiplexing) applications, etc.

Applications
  • Fiber Optics (DWDM-50GHz,100GHz)

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Spectral Characteristics / Specifications 1

Spectral Characteristics / Specifications 2

CWDM Band Pass Filter

This Band Pass Filter is used for CWDM (Coarse Wavelength Division Multiplexing) applications, and for a wavelength interval of 20 nm, the transmission band is 14 nm or wider and ripples are controlled.

Applications
  • Fiber Optics (CWDM)

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Spectral Characteristics / Specifications

Wide Band Pass Filter

Wide Band Pass Filter selectively removes specific color wavelengths for ADM (Add Drop Multiplexer) applications, etc.

Applications
  • Fiber Optics (ADM – Add Drop Multiplexers, OEXC- Opto Electric Cross Connect)

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Spectral Characteristics / Specifications

251nm Band Pass Filter

The 251nm Band Pass Filter has a center wavelength of 251nm. It has excellent temperature stability and can achieve extremely high transmission in the specified band.

Applications
  • Semiconductors Inspection Equipment
  • Measuring/Inspection Instruments

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Spectral Characteristics / Specifications

Optics for Sterilization

Sterilization optics correspond to wavelengths in the vicinity of 220–250 nm, which are effective in sterilizing coronaviruses without harming the human body, and NITTO OPTICAL can design and manufacture the coatings.

Applications
  • UV sterilization devices

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Spectral Characteristics / Specifications

Edge Filters

Edge Filters separate or combine C band/L band for fiber optic communications and are used also for separate and combine excitation light and signal light in optical amplifiers (EDFA: Erbium Doped Fiber Amplifier) and in Raman amplifiers.

Applications
  • Fiber Optics (For Fiber amplifiers)
  • Medical Equipment
  • Spectroscopic Analysis (Infrared, Ultraviolet)

Long Wave Pass Filter

: LWPF

Long Wave Pass Filters (LWPF) transmit long wavelengths and reflect short wavelengths. They have sharp spectral characteristics for specific range of wavelengths.

Applications
  • Fiber Optics (For FTTH)
  • Spectroscopic Analysis (Infrared, Ultraviolet)

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Spectral Characteristics / Specifications

Short Wave Pass Filter

: SWPF

Short Wave Pass Filters (SWPF) transmit short wavelengths and reflect long wavelengths. They have sharp spectral characteristics for specific range of wavelengths.

Applications
  • Fiber Optics (For FTTH)

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Spectral Characteristics / Specifications

Scanner Filters

: Color Trimming Filter for Scanners

Scanner Filters selectively transmit the wavelength bands required for image reading in scanners.

Applications
  • Scanners

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Attenuators

Attenuators, also called Neutral Density (ND) filters, are optical filters that can adjust light intensity either stepwise or individually. They allow continuous adjustment of light from 100% down to a few percent, and are compatible with excimer lasers such as KrF and ArF.

Applications
  • Semiconductors/LCD Exposure Devices
  • Fiber Optics

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Anti-reflection Attenuator

: Anti-reflection ND Filter

Anti-reflection Attenuators are optical elements that reduce surface reflection by optionally attenuating light intensity (25%, 50%, etc.).

Applications
  • Fiber Optics
  • Measuring Instruments

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Spectral Characteristics / Specifications

Interference Filters

Interference Filters are optical filters that transmit or reflect light in a specified wavelength range by using interference in transparent films with a thickness on the order of the wavelength of light. They allow precise wavelength selection and are used in spectroscopic measurement.

Applications
  • Spectroscopic Analysis
  • Measuring Instruments

Spectral Characteristics / Specifications

Colored Glass Filters

Colored Glass Filters utilize the absorption characteristics of glass to achieve properties that are difficult to obtain with multilayer coatings alone.

Applications
  • Spectroscopic Analysis
  • Measuring Instruments

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IR Cut Filters

IR Cut Filters block the infrared light and transmit visible light, having similar characteristics to cold filters. They are coated on substrates such as Blue Glass, D263, and various heat-resistant resin films.

Applications
  • IR cut filter for image sensors (Smart phones, DSC, Car-mounted cameras, Surveillance cameras)

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Spectral Characteristics / Specifications 1

Spectral Characteristics / Specifications 2

UV Cut Filters

UV Cut Filters block ultraviolet light and transmit visible light. They are used to prevent degradation of optical components and image sensors.

Applications
  • Medical Equipment
  • LCD/LCOS Projectors
  • DLP Projectors

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Spectral Characteristics / Specifications

Optics for medical instruments and biotech instruments

These optical components are used for applications such as laser Raman spectroscopy, and fluorescent detection methods are drawing attention. They suppress only extremely narrow wavelength bands with high optical density, while allowing nearly full transmission of all other wavelengths.

Applications
  • Medical Equipment (Laser Raman Spectroscopy, Fluorescent Imaging)

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Spectral Characteristics / Specifications1 Notch Filters

Spectral Characteristics / Specifications2 Triple Notch Filters

Spectral Characteristics / Specifications3 Triple Band Pass Filters

Spectral Characteristics / Specifications4 Band pass filters for Fluorescent observation

Spectral Characteristics / Specifications5 Long pass filters for Fluorescent observation

Fluorescence Filters

Fluorescence filter is an optical element that selectively transmits or rejects only specific wavelengths of light in fluorescence observation and analysis.
It mainly consists of three types: excitation filter, dichroic mirror, and emission filter.

Applications
  • Medical Equipment (Laser Raman Spectroscopy, Fluorescent Imaging)

Spectral Characteristics / Specifications

Gain Flattening Filters

: Gain Flat Filter : GFF

Gain Flattening Filters are special optical components used for EDFA (Erbium Doped Fiber Amplifier) in fiber optic communications. They realize optimal flattening characteristics.

Applications
  • Fiber Optics (For Fiber amplifiers)

Spectral Characteristics / Specifications

Optics for Infrared Range (Anti-Reflection Coating)

Optics for Infrared range (Anti-Reflection Coating) are optical components coated with anti-reflection films designed for infrared wavelengths. They can be widely applied to infrared light applications.

Applications
  • Windows for night vision cameras
  • Infrared radiation thermometer
  • IR sensors and CO2 lasers

Spectral Characteristics / Specifications

Optics for Infrared Range (High-Reflection Coating)

Optics for Infrared Range (High-Reflection Coating) are high-reflection mirrors designed for infrared wavelengths. They can be widely applied to infrared light applications.

Applications
  • Mirrors for night vision cameras
  • Infrared radiation thermometer
  • IR sensors and CO2 lasers

Spectral Characteristics / Specifications

Anti-Fingerprinting Coating

: Antifouling coating, AF coating

Anti-Fingerprinting Coating prevents fingerprints, oils, and water droplets from adhering to the surface, maintaining the cleanliness and visibility of optical components. It offers excellent abrasion resistance and retains it’s water- and oil-repellent performance over a long period of time.
NITTO OPTICAL is capable of processing high-performance AR coating combined with highly durable Anti-Fingerprinting Coating on substrates such as tempered glass and sapphire glass, which are commonly used for cover glass in touch panels.

Applications
  • Cover glass for touch panels
  • Face window of watches
  • Other cover glasses

Spectral Characteristics / Specifications1

Spectral Characteristics / Specifications2

Optical Thin Films for High-Power Laser Applications

Optical Thin Films for High-Power Laser Applications are realized through precision polishing and advanced coating design.
They are used in products such as laser processing machines and excimer lasers for semiconductor manufacturing equipment.

Applications
  • YAG Laser
  • Semiconductors/LCD Lithography Equipment
  • Fiber laser

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Our Test Laser List

Our Test Laser List

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