Thin dielectric films with different refractive indices are coated in multiple layers, and light interference is used to allow the selection of transmission or reflection of light from a light source at the desired wavelengths.
The number of layers of thin dielectric film coated can be from a few to several hundred, which allows various characteristics to be realized.
The shape of the substrate to be coated can be anything from flat to a parabolic mirror.
Lamp reflectors.
This mirror can be applied to various fields, including laser processing machines.
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.
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).
