PRODUCT FOCUS OPTICAL FILTERS Focus on filters
A round up of the latest optical filters, including bandpass, neutral density, reflective, narrowband, and UV and infrared
Acton Optics and Coatings provides VUV/UV optical filters in a variety of types including bandpass, neutral density, and reflective designs. These filters are used worldwide for applications such as spectroscopy, elemental analysis, environmental monitoring, biotechnology instrumentation, and space exploration, as well as basic and applied research. Acton’s standard bandpass optical filters are visually and optically inspected before they are shipped, and include individual transmittance curves to show each filter’s performance characteristics. Detailed rejection curves can be purchased at the time of manufacture. Many wavelengths and sizes are available, as are image-quality filters.
www.actonoptics.com
Alluxa’s plasma deposition technology enables the routine production of optical filters with performance and price characteristics that were previously impossible. This can be seen with the Ultra Series, which includes narrowband, dichroic, UV, IR, and notch filters.
The Ultra Series flat top narrowband filters are
available in the visible and NIR with FWHMs of 0.25 to 2nm, transmission levels of more than 90 per cent, and OD 6 blocking out of band. All Alluxa Ultra Series filters are intended to offer OEM customers and researchers a higher performance than off-the- shelf products. They highlight Alluxa’s commitment to tighter specification tolerances in order to provide the best possible system level performance.
www.alluxa.com
AP Technologies now supplies LC- Tec Displays’ PolarView-ND variable Neutral Density Filter (vNDF) based on liquid crystal technology.
Optical filters based on liquid crystal enable modulation and control the light passing through them by simply adjusting the voltage amplitude of an applied electric field. Compared to mechanical filters, LC filters are electro-optical so contain no moving parts. Fast switching, small footprint, and reliable operation are attractive design features that make them suited to a wide range of applications. PolarView-ND is designed for uniform angular transmittance and small colour shift, not only in fully open and closed states, but also intermediate grey- levels. LC-Tec is also developing Switchable Colour Filter
and Tunable Colour Filter products, which allow users to sweep through the spectrum or switch instantly from one colour to another.
www.aptechnologies.co.uk
42 ELECTRO OPTICS l FEBRUARY 2016
Delta Optical Thin Film offers Linear Variable Bandpass Filters (LVBPF) for mid-size and full- frame imaging sensors. These filters offer high transmission and are fully blocked in the light sensitive wavelength range of silicon- based detectors. Hyperspectral Imaging (HSI) has been used for some decades in satellite imaging, air reconnaissance and other price insensitive markets. Classical HSI cameras use prisms or gratings as dispersive elements. These cameras are bulky, sensitive to misalignment and expensive. The advent of alternative approaches makes HSI
Edmund Optics has extended its line of Techspec fluorescence bandpass filters. The filters are matched to common fluorophores
used in fluorescence imaging applications and are also ideal components in spectroscopy and clinical chemistry applications, and biotech instrumentation. They feature greater than 93 per cent transmission and OD 6 blocking outside of the passband. Each filter is hard sputtered coated on a single fused silica substrate, and mounted in a black anodised ring.
www.edmundoptics.com
Knight Optical offers a variety of optical filters that are available to purchase through its website. Many products are available for next day
delivery and all filters are supplied with test data as standard. New to the company’s web range is an extended selection of its dichroic and IR-Cut filters for lighting and photography applications, coated on 1.1mm thick borosilicate substrates and designed to offer value for money.
Knight Optical also provides precision custom
filters to its clients that are tested in a metrology lab by trained technicians to ensure that the product is delivered perfect.
www.knightoptical.com
Laser Components supplies a range of optical filters for various applications. It has a wide variety of standard parts including bandpass, short and long pass filters, polarisers and fluorescence filter
attractive for volume markets and consumer products, for example cancer detection, precision farming, and food testing in supermarkets. The combination of LVBPFs with silicon detectors allows the design of compact, robust and affordable HSI detectors that offer several advantages and benefits including: a huge aperture compared with grating and prism; higher transmission than grating and
prism; short measurement time; high suppression of stray light; and excellent signal to noise ratio.
www.deltaopticalthinfilm.com
sets, ready for quick dispatch. Alternatively, custom designs are available upon request, carried out by an experienced team using state of the art custom optical coating equipment. New to the range are the ultra-narrowband bandpass filters, offering the narrowest and ‘squarest’ filter profiles with very high transmission levels typically greater than 96 per cent. Ultra- narrowband filters offer wide and deep blocking performance at levels up to and beyond OD 6 without sacrificing transmission performance. Narrowband filters are now fully customisable and able to achieve extremely narrow bandwidths at very discrete wavelengths of light.
www.lasercomponents.co.uk
Pro-Lite supplies Corion brand OEM dielectric filters manufactured by Newport Franklin (a subsidiary of Newport Corporation). Standard products include: bandpass
filters; coloured glass alternative filters; dichroic heat control filters; short and long wave pass edge filters; fluorescence filters; and laser line filters. Newport’s Stabilife coating technology provides coatings without tensile and bending stress, which in turn promotes a very long life. The dielectric layers are extremely durable, thermally stable and resistant to different environmental influences. Pro- Lite also designs high performance dielectric filters for custom applications in life science, defence and security, and in analytical instrumentation.
www.pro-lite.co.uk
@electrooptics |
www.electrooptics.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56