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簡(jiǎn)要描述:Andover長(zhǎng)波通濾光片特征在于它們?cè)诜瓷浜屯干鋮^(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?yàn)V光片的**選擇。
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Andover長(zhǎng)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(zhǎng)波通(LWP)和短波通(SWP)濾光片,Andover長(zhǎng)波通濾光片特征在于它們?cè)诜瓷浜屯干鋮^(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?yàn)V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(jiān)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(zhǎng)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(duì)波長(zhǎng)隨角度的變化不敏感,這些濾光器的波長(zhǎng)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(zhǎng)或截止波長(zhǎng)的應(yīng)用中很有用。所有標(biāo)準(zhǔn)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) |
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