Linear Variable Longpass Filter

Product Description

A Linear Variable Edge Filter has an interference coating intentionally wedged in one direction to create a linear shift of the center wavelength across the length of the substrate. This shift allows for the broad filtering capabilities demonstrated by the linear variable shortpass, longpass, and dichroic edge filters. Shortpass and longpass edge filters work inversely of one another; the shortpass filter passes light throughout the filter’s length until a blocking band is reached, whereas the longpass filter blocks light until a transmission band is reached. Blocking and transmission bands are adjustable by reorienting the filter to the light source.

With its broad blocking and transmission range, a single Linear Variable Edge Filter can replace an entire filter set. When synchronized with a single moving grading spectrometer, combined longpass and shortpass edge filters reduce scatter light and harmonics. In addition, combined linear variable filters can be used as a single variable excitation filter for various fluorescence applications using white light sources.

產品系列說明

• 成對使用可構建高效率的自訂帶通濾光片
• 最佳輸入光束直徑為0.2 x 8.0mm
• OD3攔截
• 可選用線性可變帶通濾光片

線性可變邊緣濾光片可單獨使用或成對使用，以便選擇性地攔截或穿透目標波長。線性可變邊緣濾光片可提供高通、低通或二向色性濾光片等。高通邊緣濾光片穿透長於起始波長的波長，而低通邊緣濾光片則穿透短於截止波長的波長。二向色性邊緣濾光片的操作方式雖與高通邊緣濾光片相似，但可反射不必要的波長。若結合使用，線性可變邊緣濾光片能用作雷射光濾光片或可變帶通濾光片，且具可調中心波長與頻寬。