These are filters to remove the wavelength of heat contained in a light source by transmission or reflection. This dielectric multilayer film has excellent heat resistance and weather resistance. It can be coated on reflector substrates such as elliptical mirrors.
This transmits more than 85% of visible light and reflects more than 85% of light near the 1 μm wavelength.
A high thermal protection effect can be obtained against halogen lamps and xenon lamps with high radiation energy around 1 μm. In addition, it can also be coated directly onto a condenser lens to integrate the lens and filter functions.
This is a filter that transmits more than 85% of visible light and reflects more than 85% of near infrared light (wavelength that warms things) from 780 to 1,000 nm out of 780 to 2,500 nm, and absorbs near infrared light of 1,000 nm and higher.
This filter can obtain a thermal protection effect that suppresses increases in temperature due to radiant heat against halogen lamps and xenon lamps with high radiation energy around 1 μm.
This is a heat ray cut filter with enhanced heat resistance.
Since it transmits more than 85% of visible light, placing the filter in front of a halogen lamp or xenon lamp does not cause an extreme decrease in illuminance.
In addition, it can also be coated directly onto a condenser lens to integrate the lens and filter functions.
Hot-Mirror
With a multilayer coating using transparent dielectric film, this transmits more than 85% of visible light and reflects heat rays discharged from thermal energy light sources radiated from heat sources efficiently.
In addition, it also has excellent heat resistance and is effective in electromagnetic cutting.
This is a filter that transmits more than 85% of visible light and realizes high reflectivity for ultraviolet and near-infrared rays simultaneously.
It is used for thermal protection of light sources with a strong spectrum against near infrared rays and for blocking ultraviolet rays harmful to liquid crystal elements.
At our company, it is possible to deposit multilayer films on large substrate materials such as 1000mm x 1000mm.
We coat metal films such as gold, silver and aluminum on various substrates. Generally, metal films are used as mirrors in various optical systems. Metal films scratch easily, and are scratched by hand cleaning. In addition, since they oxidize, depending on the environment, they are generally given an SiO2 protective film at the final layer.
The company can coat not only flat substrates, but also large area substrates and substrates of different shapes.
We also do metallization processing for soldering that is suitable for vacuum sealing, which is required to preserve the high sensitivity of infrared image sensors.
Metal thin-film mirrors, solder-sealing
We have a track record in coating with various kinds of metal.
Gold (Au), silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), platinum (Pt), nickel (Ni), titanium (Ti), tungsten (W), molybdenum (Mo), tantalum (Ta), hafnium (Hf), niobium (Nb)
This is an optical component that separates transmitted light and reflected light at the desired ratio. It is also possible to separate P-polarized and S-polarized light from incident light (PBS: Polarizing Beam Splitter) and to produce a type with less polarization dependence (N-PBS: Non-Polarizing Beam Splitter).
Laser processing machines, measuring instrument, semiconductor exposure apparatus, FPD exposure apparatus and cameras
Cube type
Two rectangular prisms are bonded together and a dielectric multilayer film is applied to the slope of one prism to separate the P- and S-polarized components. It separates a single wavelength of the near-infrared region from the ultraviolet region, and the P- and S-polarized components of the visible region.
We design the wavelength, angle of incidence and extinction ratio to meet customer requirements. We also accept orders for optical contact lenses.
Plate type
By applying a dielectric multilayer film onto a substrate, it is possible to separate the P- and S-polarized components of a single wavelength or narrow range of wavelengths within the wavelength range from the ultraviolet region to the near infrared region. We design the wavelength, angle of incidence and extinction ratio to meet customer requirements. It has excellent light and heat resistance and is suitable for laser applications.
By applying a dielectric multilayer film onto a substrate, it is possible to separate specific wavelengths in two directions at the desired ratio within the wavelength range from the ultraviolet region to the infrared region.
We design the wavelength, angle of incidence and extinction ratio to meet customer requirements.
An ND (neutral density) filter attenuates the amount of incident light by a certain amount and is used to compensate for camera and sensor sensitivity. It can obtain a flat transmittance spectrum in the desired wavelength band. We can manufacture this filter for each wavelength band from ultraviolet to infrared.
ND filters come in two types, reflective and absorbent. The reflective-type has a multilayer dielectric film coated on a glass substrate. The absorbent-type has a metal film with light absorbing characteristics coated on a glass substrate.
We can also make a non-reflective ND filter that suppresses the reflection of incident light on the substrate surface.
ND filter characteristics are indicated by transmittance or optical density (OD).
The relationship between transmittance (T%) and OD is as follows.
Dimming light source, sensor sensitivity correction, cameras
An infrared filter is a filter that transmits the infrared region.
The infrared region is broadly divided into three regions: the near infrared region (NIR) of the roughly 0.7 to 2.5 μm band, the mid-infrared region (MIR) of the 2.5 to 25 μm band, and the far infrared region (FIR) of the 25 to 1,000 μm band.
Infrared rays are used in a very wide range of applications, from crime prevention to astronomical observation and sensors.
In the mid-infrared region in particular, we have transparent substrate materials with a high refractive index and can produce multi-layer interference filters with various characteristics as we can obtain a wider range of cutoff characteristics than in the visible region using spectral absorption.
High refractive index substrate materials include quartz, sapphire, Si, Ge, chalcogenide, etc., and the material to be used can be selected in consideration of the required spectral characteristics and durability.
In addition, we can not only produce filters that allow light to pass through, but also mirrors that reflect the above areas.
Various gas analysis (CO2, CO, HC, NOx, SOx, O3 gas, etc.), surface measurement, radiation thermometer (thermography and temperature sensors), diffraction grating high-order cut filters, human sensors, other optical systems and cameras using infrared rays, etc.
These are the general spectral characteristics of anti-reflection coating, edge filters (LPF) and interference filters (BPF) in the mid-infrared region.
This is an example of a filter that achieves high transmittance in the above area.
A linear variable filter (LVF) coats a filter with spectral characteristics that change continuously in a line within a single substrate.
By changing the position of the light incident on the filter, the transmission spectrum can be changed continuously.
The membrane design can be tailored to the target application and can be produced not only as a band-pass filter-type, but also as a long-pass filter or short-pass filter-type.
The size of the linear variable filter can be set at will, and can be manufactured with a long side of 10 mm or less.
Linear variable filters use high density metal oxide film, so they have high durability.
Color meters, light measurement, monochromators, etc.
Hard-coated band-pass filters have excellent durability due to plasma-ion process coating.
Their characteristic is that the interference of reflected light generated at the interface of the thin film can be used to selectively transmit the desired specific wavelength.
Compared to absorbent filters such as glass and gelatin, this filter can restrict the transmission band narrowly and separate the transmission band sharply from the inhibition band, allowing extremely clear contrast characteristics to be obtained. With regard to inhibition performance, it is possible to support OD6 or higher in the visible region. The applicable wavelength range is from the ultraviolet region to the infrared region.
Apart from that, we can also respond to requests for desired size, transmittance, inhibition band, etc.
LiDAR, 3D sensing, fluorescence analysis, Raman analysis, exposure apparatus, medical treatment, gas analysis, lasers, optical communications, astronomical observation, various sensors, etc.
The definition of the central wavelength (λ0) of a band-pass filter can be divided broadly into the two following types.
The type of soft coat band-pass filter differs depending on the product, so please use this as a reference. We design hard coated band-pass filters to meet customer requirements.
We can produce highly durable anti-reflection films with DLC coating (hard carbon film; diamond-like carbon).
The company’s unique coating using a plasma CVD method combines two features: high transmittance rates and high durability in the mid-infrared region (MIR).
We can coat Ge, Si, quartz, glass, chalcogenide and other substrate materials.
In addition, we can work not only with flat plates, but also lens materials, so please consult with us about your needs.
Infrared image element windows, combined lens for optical systems using infrared, window material for CO2 laser processing machine, etc.
DLC is transparent in the mid-infrared region (MIR) so we can obtain anti-reflection film with high transmittance for Ge and Si substrates.
We can obtain a film surface with high hardness and excellent wear resistance for use as a protective film on the outermost layer.
In addition, it also has excellent moisture and salt water resistance.
Humidity resistance: 85・C / 85%Rh 600Hr
Peeling resistance: MIL-C-48497A 4.5.3.1
Salt water resistance: 85・C / 5wt% / 24Hrs
Maximum filmable size: φ400
This is known generally as AR (anti-reflection).
It is a coating process in which a thin dielectric film is formed on the surface of a substrate in a single layer or multiple layers, and the reflectivity of the surface is reduced by light interference.
This increases the transmittance of the substrate, eliminates reflection on the surface and prevents ghosting.
The band of the anti-reflection effect can be selected by manipulating the thickness of the film, the number of layers and the combination of materials.
A wide range of wavelengths is available, from ultraviolet to infrared.
And a wide range of materials can be coated, including glass and infrared crystal materials.
Provides coatings on glass, resin, quartz, sapphire, ruby, YAG, Si, Ge, ZnSe, ZnS, etc. and other optical crystals.
Various cover glasses, prevention of ghosting on assembled lenses, sensor windows, etc.
Example applications include coating on curved lens surfaces, fiber end surfaces, cover glass surfaces, and crystal materials (CaF2, Si, Zn, Se).
Various cover glasses, prevention of ghosting on assembled lenses, sensor windows, etc.
Example applications include coating on curved lens surfaces, fiber end surfaces, cover glass surfaces, and crystal materials (CaF2, Si, Zn, Se).
