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MidOpt Acrylic Longpass filters
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Acrylic Longpass filters are a durable, lightweight and economical solution for inspection windows. They can protect a lens in environments where broken glass might pose a problem. With a high transmission ranging from 90 to 98% and an anti-reflection coating for maximum transmission, these filters are made from impact-resistant, optical-grade acrylic and are half the weight of glass filters.
Half the weight of glass. Acrylic Filters are available in Threaded Mounts, sizes M13.25 to M105, and in Slip Mounts. Acrylic Filters can be precision laser-cut to a desired size or configuration.

They are frequently used as enclosure windows for outdoor applications, as well as over light sources to control the wavelength emission of broad spectrum light sources. Because of their durability, they’re commonly used in regulated applications where glass over the inspection area may not be permitted.

Model
AC380 A/R protective window - Used where the lens needs to be protected or when in regulated applications where the use of glass filters are prohibited

AC380 is an abrasion, scratch, breakage and solvent resistant acrylic protective window made to withtand harsh environments, are half the weight of glass windows and are 50 times more scratch resistant and impervious to all types of solvents and chemicals including: acetone and MEK.

This filter blocks almost all UV light while averaging greater than 98% transmission in the 450-700nm visible spectrum. This acrylic protective window is a highly effective yet economical solution for covering camera enclosures and on-axis lighting. Available from stock in 2mm and 3mm thicknesses as well as custom sized

 
Useful Range
Cut-on Wavelength 50% T
Tolerance
Peak Transmission
Surface Quality
450-850nm
380nm
+/- 10nm
≥ 95%
40/20
 

Model
AC685 Acrylic NIR Longpass Filter - Ensuring that mainly IR light reaches the object

The AC685 IR Pass/Visible Block filter material is a 2mm thick acrylic sheet with carefully-controlled near-IR spectral properties.

It can be laser cut according to customer specifications and is typically mounted over full spectrum UV/Visible/IR lamp-based lighting to ensure that (mainly) infrared light reaches the subject while otherwise distracting visible light is effectively blocked.

 
Useful Range
Cut-on Wavelength 50% T
Tolerance
Peak Transmission
Surface Quality
710-1100nm
685nm
+/- 10nm
≥ 90%
80/50
 
Model
AC760 Acrylic NIR Longpass Filter - Ensuring that mainly IR light reaches the object and blocks a portion of the very near IR

AC760 is similar to AC685 except that it also blocks a portion of the very near IR. It is very well suited for use with 785nm, 810nm, 830nm or 850nm laser diode or LED illumination, or in situations where visible light emitted by arc/flash lamps needs to be blocked while near-IR illumination is passed.

AC760 material is custom cut from a 2mm thick sheet according to customer specifications

 
Useful Range
Cut-on Wavelength 50% T
Tolerance
Peak Transmission
Surface Quality
710-1100nm
685nm
+/- 10nm
≥ 90%
80/50
 

 

 

 

 

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