Andover長(chang)波(bo)通濾光(guang)片(pian)
這些(xie)尖(jian)銳邊(bian)緣(yuan)濾(lv)波(bo)器通常(chang)被稱(cheng)為長(chang)波(bo)通(LWP)和短(duan)波(bo)通(SWP)濾光(guang)片(pian),其特征(zheng)在(zai)於(yu)它們(men)在(zai)反(fan)射和透射區域之間(jian)的(de)高轉換(huan)率。如此高的(de)轉(zhuan)換(huan)率使(shi)其成(cheng)為熒(ying)光(guang)應用(yong)中(zhong)的(de)發射(she)濾(lv)光片(pian)以(yi)及光(guang)度法中(zhong)的(de)排(pai)序濾(lv)光(guang)片(pian)的(de)**選(xuan)擇(ze)。它們(men)還可(ke)以(yi)用(yong)作雜(za)散光或微(wei)調濾(lv)光片(pian),以(yi)消除任何(he)不需要(yao)的(de)近(jin)帶(dai)輻射。所(suo)有Andover LWP / SWP濾光(guang)片(pian)均由(you)堅(jian)硬,耐(nai)用(yong)的(de)**表(biao)面(mian)介電塗層(ceng)構成(cheng),可(ke)承(cheng)受(shou)與(yu)任何(he)高質量(liang)光學(xue)組(zu)件(jian)相(xiang)關的(de)常(chang)規(gui)清(qing)潔(jie)和處(chu)理(li)。它們(men)的(de)膜結構(gou)本質上是(shi)經過(guo)修改(gai)的(de)四(si)分之壹波(bo)長(chang)疊堆,利用(yong)幹涉(she)效應而(er)不是(shi)吸收來隔(ge)離(li)其光譜帶(dai)。與(yu)濾鏡(jing)不同(tong) 由(you)於(yu)對波(bo)長(chang)隨角(jiao)度的(de)變(bian)化不敏(min)感(gan),這些(xie)濾(lv)光(guang)器的(de)波(bo)長(chang)隨入射角(jiao)的(de)增(zeng)加(jia)而變(bian)短。此(ci)功能(neng)在(zai)可(ke)能(neng)需(xu)要(yao)微(wei)調50%截(jie)止(zhi)波(bo)長(chang)或截(jie)止(zhi)波(bo)長(chang)的(de)應用(yong)中(zhong)很有用(yong)。所有標(biao)準(zhun)邊(bian)緣(yuan)濾(lv)光(guang)片(pian)都可(ke)以(yi)從400nm到(dao)1000nm以(yi)50nm的(de)增(zeng)量(liang)遞增。
▪ Low-cost
▪ Wide slection of wavelengths
▪ Provide steeper transistion than color glass filters
Andover長(chang)波(bo)通濾光(guang)片(pian)
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) |
| DESCRIPTION | PART NO. |
| 300.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 300FH90-12.5 |
| 300.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 300FH90-25 |
| 300.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 300FH90-50 |
| 300.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 300FH90-50S |
| 325.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 325FH90-12.5 |
| 325.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 325FH90-25 |
| 325.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 325FH90-50 |
| 325.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 325FH90-50S |
| 350.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 350FH90-12.5 |
| 350.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 350FH90-25 |
| 350.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 350FH90-50 |
| 350.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 350FH90-50S |
| 375.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 375FH90-12.5 |
| 375.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 375FH90-25 |
| 375.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 375FH90-50 |
| 375.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 375FH90-50S |
| 400.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 400FH90-12.5 |
| 400.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 400FH90-25 |
| 400.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 400FH90-50 |
| 400.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 400FH90-50S |
| 450.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 450FH90-12.5 |
| 450.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 450FH90-25 |
| 450.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 450FH90-50 |
| 450.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 450FH90-50S |
| 500.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 500FH90-12.5 |
| 500.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 500FH90-25 |
| 500.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 500FH90-50 |
| 500.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 500FH90-50S |
| 550.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 550FH90-12.5 |
| 550.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 550FH90-25 |
| 550.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 550FH90-50 |
| 550.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 550FH90-50S |
| 600.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 600FH90-12.5 |
| 600.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 600FH90-25 |
| 600.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 600FH90-50 |
| 600.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 600FH90-50S |
| 650.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 650FH90-12.5 |
| 650.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 650FH90-25 |
| 650.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 650FH90-50 |
| 650.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 650FH90-50S |
| 700.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 700FH90-12.5 |
| 700.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 700FH90-25 |
| 700.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 700FH90-50 |
| 700.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 700FH90-50S |
| 750.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 750FH90-12.5 |
| 750.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 750FH90-25 |
| 750.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 750FH90-50 |
| 750.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 750FH90-50S |
| 800.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 800FH90-12.5 |
| 800.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 800FH90-25 |
| 800.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 800FH90-50 |
| 800.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 800FH90-50S |
| 850.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 850FH90-12.5 |
| 850.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 850FH90-25 |
| 850.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 850FH90-50 |
| 850.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 850FH90-50S |
| 900.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 900FH90-12.5 |
| 900.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 900FH90-25 |
| 900.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 900FH90-50 |
| 900.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 900FH90-50S |
| 950.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 950FH90-12.5 |
| 950.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 950FH90-25 |
| 950.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 950FH90-50 |
| 950.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 950FH90-50S |
| 1000.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 100FH90-12.5 |
| 1000.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 100FH90-25 |
| 1000.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 100FH90-50 |
| 1000.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 100FH90-50S |