Envin has for many years been manufacturing and supplying optical filters for use from the ultra violet to the far infrared. On-site manufacturing has enabled Envin to support customers by designing and prototyping new filter products using technology compatible with subsequent production.
The creation of novel prototype Advanced Performance Optical Filter products is now possible in a rapid and cost effective manner which was not previously achievable.
Astrodon® tru-balance professional filters are the first filters designed to match the sensitivity of modern Iccd cameras. Using filters matched with the detectors greatly simplifies all aspects of deep-sky tri-color imaging. Benefits include shorter imaging times, G2V white point balance, balanced OIII nebula color, and pre-balanced RGB channels when using Kodak Blue Plus CCDs.
They are an outgrowth of over a year and a half of research, published in Sky and Telescope and presented at AstroImage and Imaging the Sky conferences. The narrowband filters, H a, SII and OIII, allow you to image when the moon is up, thereby extending the amount of imaging time you have each month. Since they are parfocal with the LRGB filters, you can easily focus on the L or C filter and then switch to the narrowband filter WITHOUT refocusing.
Meadowlark Optics' Liquid Industrial crystalTunable filters (LCTF) facilitate spectral analysis of not only a collimated beam, but more importantly of an entire object. Applications of Liquid Crystal Tunable Professional filters include fluorescence microscopy, absorption microscopy, Raman microscopy, and solar astronomy.
IR Cutoff Professional filters and Optical Low Pass Filter for use with CMOS/Ccd sensors. These filters can be modified to meet your specifications.
Infrared (IR) cut-off filters are used with color CCD or CMOS imagers to produce true color images. An IR cut-off filter blocks the transmission of the infrared while passing the visible. This can be done with two optical techniques: absorption or reflection. Absorptive filters are made with special optical glass that absorbs near infrared radiation. Reflection type filters are essentially short-pass interference filters that reflect infrared light with high efficiency. We offer two types of absorptive filters: IRC20 and IRC21. The standard reflection type (IRC30) filter offers cut-off wavelength at 640nm (+/-10nm). Other cut-off wavelength can be selected for custom orders. IRC20 type is recommended for CCD imagers while IRC21 and IRC30 are more suited for CMOS imagers. The standard sizes are listed below. Other sizes can be custom ordered.
Spectrogon designs and manufactures optical interference professional filters employing state of the art deposition technology and the most advanced design criteria available.
The motorized Filter Wheel 40 permits automatical changing of 4 or 6 professional filters. Unmounted filters ø 25 mm/1", or optics in ø 25 mm mounts can be used.
The FRM 40 filter wheel can be mounted on a SYS 40 industrial slide. Using adapter plate ADP-S65-S40-20 it can be fitted to a SYS 65 slide.
In terms of drive, a 2-phase step motor as well as a DC servo motor version is available. As a standard, a contactless Hall-effect limit professional switch is integrated.
Holders are not scope of delivery.
All aluminium parts have a top quality black anodised protective coating.
- compatible with SYS 40 and with SYS 65
- deformation-resistant aluminium, black anodized
- mountable on slide
- with step motor or geared DC servo motor
- contactless, high-precision Hall-effect manufacturer of limit switches
Apogee AI-FW50 Series Professional filter Wheels for Alta and Ascent Models
The AI-FW50 series of filter wheels provide large format filtering solutions for the Alta and Ascent series of imaging systems. The FW50 filter wheel currently has two interchangeable filter carousels; A large 7 position 50mm square wheel ideal for the U9000 and U16 imaging systems, and a 9 position 50mm round wheel ideal for any other Alta or Ascent system.
The filter wheel is controlled via USB 2.0. The filter wheel easily adapts to the Alta D2, D7, and D9 bodies, as well as to AP systems.
· MOULD ACRYLIC PROFESSIONAL FILTERS WITH AN EMBEDDED FINE
MATERIAL MESH FOR HIGHEST EMI/RFI
SUPPRESSION
· BLACKENED, SILVER-PLATED OR BRIGHT MESH IN
STAINLESS STEEL OR COPPER (100 openings per inch,
blackened stainless steel is standard)
· LIGHT TRANSMITTANCE 80% IN RELATION TO
TRANSPARENT ACRYLIC
· 40 DIFFERENT COLOURS AND MAT-FINISH SURFACE
TREATMENTS
· CNC MACHINED EDGES, FINISHED WITH SILVER
PAINT and READY-TO-INSTALL
· OPERATION TEMPERATURES: -40°C / +70°C
· ANGLED MESH TO AVOID EVENTUAL DISTRACTING
EFFECTS SUCH AS NEWTON RINGS
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EMI shielding
