Filters and coatings for the Near Infrared (700 – 2000nm) region are becoming increasingly important. Applications include Imaging, Telecommunications, Laser technology, ANPR and Multi-Photon Fluorescence. Cross region coatings for simultaneous use in the visible and NIR regions are also of growing interest; Envin has detailed experience regarding the careful selection of materials required to produce […]
Telecommunication Filter products are normally associated with Laser diodes operating in NIR 830, 1310 and 1550nm wavelength regions. Fibre optics are used to transmit the light with additional elements such as filters (to modify or divide the signal) or ball lenses to couple fibres together with minimal losses. Low loss AR coatings are essential for […]
Applications involving Lasers and Filters or Optical Coatings are widespread and diverse. This can range from relatively simple products such as Antireflection Coatings on windows or lenses to Multi-wavelength High Optical Density Blocking Filters. Other variations include Partial Reflectors, Beamsplitters, Bandpass Filters and Single Wavelength Blocking Filters. A small example of common Laser types are […]
LED’s are used in a multitude of applications from low cost consumer lighting to expensive medical diagnostic systems. LED’s are not monochromatic and can vary in output wavelength position and profile as a result of manufacturing tolerances, operating conditions and age. Filters are used to fine tune and stabilise the output such that the characteristics […]
Filters are used to produce light of a certain colour by selection of the appropriate region of the visible spectrum (380-780nm). Dichroic Colour Filters are commonly used for lighting applications in thousands of Industrial, Scientific and Entertainment environments. In addition they may be used to modify the colour temperature of a light source. The ability […]
Optical Filters are used in imaging applications to introduce or improve contrast enhancement. The resulting images are used to discriminate between good and bad products or to identify manufacturing issues. Imaging can use different wavelength regions and detectors such as CMOS 300-1100nm, InGas 700-1700nm or Infrared 2-8 microns. Dual region techniques such as Visible and […]
Bandpass Filters are commonly used to isolate narrow emission or absorption features from a broad spectral range within analysis instrumentation. Multiple filters are often used within a selction mechanism such as a filter wheel. These filters are traditionally manufactured using cemented structures utilising soft coatings. Envin offers such filters in a wide range of wavelengths […]
