O17907 Longpass Filter
Deliver orange and red light transmission with exceptional green and blue suppression across the entire spectrum.
- Passband: 565 – 780 nm, 91.3 – 95.6 % T (± 2.1 % ripple)
- Cut-on (T50): ≈ 552 nm
- Edge steepness: ~28 nm (10 → 90 % transition)
- Blocking: < 0.98 % T below 515 nm (OD ≥ 2)
- AOI: 0° (normal incidence); custom angles available
- Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
- Custom options: Edge tuning, ripple smoothing, 45° AOI, rapid prototypes
Learn more
O17907 Hybrid delivers Passband 565 – 780 nm, 91.3 – 95.6 % T (± 2.1 % ripple), Cut-on (T50) ≈ 552 nm, and Edge steepness ~28 nm (10 → 90 % transition).
The hard-oxide coating is built for repeated handling, heat, and cleaning.
Best suited for:
Orange-red LED imaging, RFP and mCherry fluorescence, sodium-line isolation, warm-tone stage and accent lighting, and photographic warmth enhancement.
Description
The O17907 cuts on at 552 nm, blocking UV through the green band while transmitting the warm-visible and near-infrared spectrum. Average transmission exceeds 94 % from 560 to 780 nm, peaking at 95.6 % near 751 nm. The blocking region holds below 1 % from 403 to 531 nm. An elevated UV shoulder around 380-402 nm reaches approximately 14 %, which may need supplementary UV blocking in sensitive applications. This filter cleanly isolates the warm half of the visible spectrum.
Key Advantages
- 552 nm cut-on for warm-visible pass - T50 % at 552 nm opens the passband at the yellow-green boundary, passing everything from yellow through NIR.
- 95.6 % peak with > 94 % average - Broad flat passband across 220 nm of bandwidth from 560 to 780 nm.
- OD 2+ blocking 403-531 nm - Deep rejection of blue and green wavelengths with average transmission under 0.6 %.
- Hard-oxide durability - Ion-assisted sputtered hard coating resists environmental degradation and repeated cleaning.
- Custom formats - Round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21-3.8 mm, on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG substrates.
Typical Applications
- Fluorescence emission filtering - Collects yellow through red emission from fluorophores like rhodamine and Texas Red while blocking green excitation.
- Color-temperature control - Removes cool tones from broadband sources to shift color temperature toward warm white in machine vision and photography.
- Vegetation red-edge analysis - Passes the red-edge and NIR bands critical for plant health assessment while blocking photosynthetically active blue-green.
- Flame photometry - Transmits sodium and other metallic emission lines in the yellow-red range while blocking blue flame background.
- Stage & event lighting - Creates warm-toned washes from yellow through deep red with no green or blue contamination.
KUPO Optics manufactures the O17907 to your exact specifications. Prototypes ship in days, production volumes on your schedule.
FAQ
O17907 FAQ
What is O17907 and what is it used for?
O17907 is a 550 nm Longpass Filter. The O17907 cuts on at 552 nm, blocking UV through the green band while transmitting the warm-visible and near-infrared spectrum. Average transmission exceeds 94 % from 560 to 780 nm, peaking at 95.6 % near 751 nm. Common uses include Fluorescence emission filtering, Color-temperature control, Vegetation red-edge analysis, and Flame photometry.
What are the key optical specs of O17907?
Key published specs for O17907 include Passband: 565 – 780 nm, 91.3 – 95.6 % T (± 2.1 % ripple); Cut-on (T50): ≈ 552 nm; Edge steepness: ~28 nm (10 → 90 % transition); Blocking: < 0.98 % T below 515 nm (OD ≥ 2); AOI: 0° (normal incidence); custom angles available.
What applications is O17907 best suited for?
O17907 is commonly used for Fluorescence emission filtering, Color-temperature control, Vegetation red-edge analysis, and Flame photometry. Fluorescence emission filtering - Collects yellow through red emission from fluorophores like rhodamine and Texas Red while blocking green excitation.
Can O17907 be customized for size, substrate, or coating requirements?
KUPO lists the construction for O17907 as Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick. Published custom options include Edge tuning, ripple smoothing, 45° AOI, rapid prototypes. Custom formats - Round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21-3.8 mm, on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG substrates.
What should I know about angle of incidence and durability for O17907?
The published angle of incidence for O17907 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
