An optical filter is a plane-parallel plate that selectively changes the spectral composition, spatial distribution, and intensity of light radiation passing through it.
Types of optical filters
Absorption (colored glass): absorb unwanted wavelengths within their volume and convert this energy into heat. Our company manufactures elements from all 13 groups of glass in accordance with GOST 9411-91.
- UV and visible range: UVS (ultraviolet), FS (violet), SS (blue), ZS (green), ZHZS (yellow-green).
- Longwave cut-off: ZHS (yellow), OS (orange), KS (red), IKS (infrared).
- Special: SZS (blue-green heat-absorbing), NS (neutral density), TS (dark protective), BS (colorless, cutting off hard UV).
- Combined: assembled from several colored glasses to select a specific spectral region.
Interference (thin-film): reflect unwanted spectral ranges through multiple-beam interference in deposited dielectric layers, transmitting only the target range. For tasks where colored glass is not enough, we produce high-precision thin-film elements:
- Bandpass: select narrow spectral regions.
- Longpass/Shortpass: provide a sharp boundary between full transmission and blocking ranges.
- Notch: completely cut out a single specific wavelength (bandwidth FWHM from 10 nm), blocking the rest of the spectrum.
We manufacture optical components both in serial batches and as single prototypes (from 1 pc. up to 3000–5000 pcs.) according to individual drawings and customer specifications.
| Specification | Standard | Achievable |
| Diameter/overall size | 1 – 120 mm | 1 – 500 mm |
| Material | “Colored Optical Glass” 9411-91 | “Colored Optical Glass” 9411-91 |
| Diameter/size tolerance | +0.0/-0.2 mm | +0.0/-0.02 mm |
| Thickness tolerance | +/-0.2 mm | +/-0.02 mm |
| Parallelism / maximum wedge | < 5 arc min | < 5 arc sec |
| Surface quality | P = I – IX | P = 0 – 10, 0 – 20, 0 – 40, I – IX |
| Flatness (at 633 nm) | 0.5 fringe | 0.2 fringe |
| Clear aperture | >90% of diameter/overall size | >95% of diameter/overall size |
| Coating | As per customer request | As per customer request |
Applications
Our optical components undergo strict quality control and are supplied to leading Russian instrument-making enterprises for integration into the following equipment:
- Photometry, radiometry, and luxmetry: precision components for luxmeters, luminance meters, pulse oximeters, UV radiometers, and calibration colorimeters.
- Marine, aviation, and navigation instrumentation: fault-tolerant optics for onboard automation systems, navigation complexes, precision sensors, and specialized measuring instruments.
- Environmental monitoring and gas analysis: optical elements for multi-component industrial gas analyzers, continuous emission monitoring systems, and ambient air monitoring stations.
- Vehicle inspection equipment: filters for diagnostic devices (glass tint transmittance meters, smoke meters, headlight adjustment equipment), as well as for certified breathalyzers.
- Spectrometry and analytical instrumentation: dispersing elements, cut-off and reference filters for spectrophotometers, rapid metal composition analyzers, and laboratory optical systems.
Advantages of cooperation with our company:
- Strict compliance with standards: incoming raw material control and final product inspection fully meet the requirements of GOST 11141-84.
- In-house spectrometric control: each batch is accompanied by a quality certificate with an individually measured spectral transmittance or reflectance curve.
- Direct import substitution: we select precise equivalents of foreign glass brands, adapting specifications to domestic manufacturing standards.
- Production flexibility: no strict minimum order volume – we manufacture test samples and custom optics from 1 piece.
- Convenient for equipment manufacturers: we supply clean optical components, fully ready for integration into your own housings, mounts, and opto-mechanical assemblies.
