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.
Applications
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)
Example characteristics
Gold mirror for Near-infrared
Gold mirrors have high reflectivity in a wide range of the near-infrared to infrared regions.
Aluminum mirror
Aluminum mirrors can be used in the visible to infrared range. They have reflectivity of about 85% in visible light and about 90% in the near-infrared and infrared regions.
Features
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.
Applications
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.
Example characteristics
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.
Features
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.
Applications
LiDAR, 3D sensing, fluorescence analysis, Raman analysis, exposure apparatus, medical treatment, gas analysis, lasers, optical communications, astronomical observation, various sensors, etc.
Example characteristics
Narrow band-pass filter with a half value of 1 nm or less.
Standard band-pass filter in the visible light range.
Near-infrared region band-pass filter. We are also able to customize the inhibition band to block the full visible light range.
Definition of central wavelength
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.
Type ①
タイプ②
Features
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.
Applications
Infrared image element windows, combined lens for optical systems using infrared, window material for CO2 laser processing machine, etc.
Example characteristics
High transmittance rate
DLC is transparent in the mid-infrared region (MIR) so we can obtain anti-reflection film with high transmittance for Ge and Si substrates.
High durability
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
