Short and Long-Wave Pass Filters
  • Steep transition slope
  • High rejection/transmission
  • Excellent temperature stability
  • Cut-on/Cut-off wavelengths available from 400 nm to 1000 nm
  • Blocked to X-ray (LWP) and 1200 nm (SWP)
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General Description Models

These short and long-wave pass filters have a very steep transition between the region of transmission and reflection — much steeper than colored glass filters. They have a hard, dielectric filter coating using interference effects rather than absorption to isolate the spectral bands. Unlike colored glass filters, the center wavelength will shift to shorter wavelengths with an increase in angle of incidence (see Laser Line Filters for formula). This can be useful for tilt tuning these filters to your exact wavelength. A custom bandpass filter with excellent performance can be constructed using a combination of a short-wave pass and a long-wave pass filter.

These filters are available individually and in sets. The sets consist of one of each, of either the short or long-wave pass filters listed. They are shipped in a hardwood box for convenient storage and protection.

Newport long and short-wave pass filters are manufactured using methods and materials designed to deliver the highest spectral performance while providing a robust construction capable of withstanding variable climatic conditions. Transition slopes of ≤6% are established by a dielectric thin-film coating. This coating is optimized to provide a wide band of high average transmission. Blocking to X-ray on long wave pass filters, and to 1200 nm on short wave pass filters, is accomplished by a combination of reflection from dielectric thin-film coatings, and absorption from filter glasses. We manufacture these filters using scribed and laminated construction. This method provides a glass-epoxy-glass seal around the perimeter of the filter, which prevents the ingress of moisture into the thin-film filter elements. The resulting filter assemblies deliver excellent field life in harsh climatic conditions.

These filters are available individually and in sets. The sets consist of one of each of either the short or long-wave pass filters listed. They are shipped in a hardwood box for convenient storage and protection.

In addition to using these filters in the traditional manner, they can be used to create custom bandpass filters with excellent performance by using a combination of a short-wave pass and a long-wave pass filter in series.

Specifications
 Minimum Active Area  20.2 mm
 Surface Quality  80-50 scratch-dig; F/F per MIL-F-48616
 Diameter  25.4 +0/-0.5 mm
 Thickness  2.0 to 7.6 mm
 Angle of Incidence  Normal
 Tav Minimum Average Transmittance  Short Wave Pass: 65%
Long Wave Pass: 80%
 Rejection (spectral)  Short Wave Pass: 1.2λc to 1200 nm, ≤0.1% T or ≤10-3
Long Wave Pass: X-Ray to 0.85 λc, ≤0.1% T or ≤10-3
 Slope*  ≤6% where slope%=100% (λ80%Tpk-λ5%Tabs)/λ5%Tabs
 Effective Index of Refraction ne  1.7
 Wavelength Shift with Temperature  Short Wave Pass: 0.02 nm/°C
Long Wave Pass: 0.025 nm/°C
 Humidity  Per MIL-STD-810E, Method 507.3, Procedure III Modified to 7 cycles
 Temperature Range  -50°C to + 100 °C
 Cleaning  Non-abrasive method, acetone or isopropyl alcohol
on lens tissue recommended (see Care and Cleaning of Optics)

 Model  λc Cut-On Wavelength @ 50% of Tpk (nm)  Minimum Spectral range of Transmittance λ1 to λ2  Oriel Model  Corion Model
 Short-Wave Pass Filters
 10SWF-450-B  450 ± 5  415–440  57371  LS-450-F
 10SWF-500-B  500 ± 5  415–490  57373  LS-500-F
 10SWF-550-B  550 ± 5  415–540  57375  LS-550-F
 10SWF-600-B  600 ± 5  415–590  57377  LS-600-F
 10SWF-650-B  650 ± 5  415–640  57379  LS-650-F
 10SWF-700-B  700 ± 6  440–685  57381  LS-700-F
 10SWF-750-B  750 ± 6  475–735  57383  LS-750-F
 10SWF-800-B  800 ± 6  475–785  57385  LS-800-F
 10SWF-850-B  850 ± 6  475–835  57387  LS-850-F
 10SWF-900-B  900 ± 7  475–880  57389  LS-900-F
 10SWF-950-B  950 ± 7  475–930  57391  LS-950-F
 10SWF-1000-B  1000 ± 7  475–980  57393  LS-1000-F
 Long-Wave Pass Filters
 10LWF-400-B  400 ± 5  410–1200  57345  LL-400-F
 10LWF-450-B  450 ± 5  460–1200 nm  57347  LL-450-F
 10LWF-500-B  500 ± 5  510–1200 nm  57349  LL-500-F
 10LWF-550-B  550 ± 5  560–1200 nm  57351  LL-550-F
 10LWF-600-B  600 ± 5  610–1200 nm  57353  LL-600-F
 10LWF-650-B  650 ± 5  660–1200 nm  57355  LL-650-F
 10LWF-700-B  700 ± 6  715–1200 nm  57357  LL-700-F
 10LWF-750-B  750 ± 6  765–1200 nm  57359  LL-750-F
 10LWF-800-B  800 ± 6  815–1200 nm  57361  LL-800-F
 10LWF-850-B  850 ± 6  865–1200 nm  57363  LL-850-F
 10LWF-900-B  900 ± 7  920–1200 nm  57365  LL-900-F
 10LWF-950-B  950 ± 7  970–1200 nm  57367  LL-950-F
 10LWF-1000-B  1000 ± 7  1020–2200  57369  LL-1000-F


*Slope is given by: | [ {λ (80%Tpk) - λ (5%Tpk)} ÷ λ (5%Tpk)] | × 100

Short-Wave Pass Filters



Long-Wave Pass Filters