Andover長波通濾光片

簡要描述：Andover長波通濾光片特征在于它們在反射和透射區(qū)域之間的高轉(zhuǎn)換率。如此高的轉(zhuǎn)換率使其成為熒光應(yīng)用中的發(fā)射濾光片以及光度法中的排序濾光片的**選擇。

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更新時間：2024-09-30
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詳細介紹

Andover長波通濾光片主要功能介紹：

這些尖銳邊緣濾波器通常被稱為長波通（LWP）和短波通（SWP）濾光片，Andover長波通濾光片特征在于它們在反射和透射區(qū)域之間的高轉(zhuǎn)換率。如此高的轉(zhuǎn)換率使其成為熒光應(yīng)用中的發(fā)射濾光片以及光度法中的排序濾光片的**選擇。它們還可以用作雜散光或微調(diào)濾光片，以消除任何不需要的近帶輻射。所有Andover LWP / SWP濾光片均由堅硬，耐用的**表面介電涂層構(gòu)成，可承受與任何高質(zhì)量光學(xué)組件相關(guān)的常規(guī)清潔和處理。它們的膜結(jié)構(gòu)本質(zhì)上是經(jīng)過修改的四分之一波長疊堆，利用干涉效應(yīng)而不是吸收來隔離其光譜帶。與濾鏡不同由于對波長隨角度的變化不敏感，這些濾光器的波長隨入射角的增加而變短。此功能在可能需要微調(diào)50％截止波長或截止波長的應(yīng)用中很有用。所有標準邊緣濾光片都可以從400nm到1000nm以50nm的增量遞增。

Low-cost

Wide slection of wavelengths

Provide steeper transistion than color glass filters

General Specifications

Thickness:	4.0mm maximum
Size Tolerance:	+0.0mm/-0.5mm
Min. Clear Aperture:	85% of outside dimension
Substrate Material:	Glass (Note: BK-7 or Borofloat available as an option for higher Tx.)
Flatness:	3-5 waves per 25 TWF
Surface Quality:	80-50 per MIL-C-48497A
Humidity and Abrasion:	Per MIL-C-67**
Operating Temperature:	-50°C to +200°C
Cut-on Slope:	6% maximum (11% for 300nm filter)
Cut-on Tolerance:	±10nm from 400nm-1100nm ±5nm from 300nm - 375nm
Mechanical:	Unmounted

Transmission

Long Wave Pass:	85% average from the 50% cut-on point to 2000nm
Short Wave Pass:	400-450nm: 85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point 500-1000nm: 85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point Note: with the exception of the 400nm filter, all SWP filters will drop off in transmission at wavelengths under 400nm.)

Rejection

Long Wave Pass:	99% or greater from 0.9 x the 50% point to the UV
Short Wave Pass:	99% or greater from 1.07 x the 50% point to 1.25 x the 50% point
Effective index of refraction (n*)	1.7 (approximately)

Andover長波通濾光片參數(shù).png