O15808 Longpass Filter
Pass red and infrared with remarkable blocking of all shorter wavelengths up to 525 nm.
- Passband: 578 – 780 nm, 90.9 – 95.7 % T (± 2.4 % ripple)
- Cut-on (T50): ≈ 565 nm
- Edge steepness: ~28 nm (10 → 90 % transition)
- Blocking: < 0.93 % T below 525 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
O15808 Hybrid delivers Passband 578 – 780 nm, 90.9 – 95.7 % T (± 2.4 % ripple), Cut-on (T50) ≈ 565 nm, and Edge steepness ~28 nm (10 → 90 % transition).
The hard-oxide coating is built for repeated handling, heat, and cleaning.
Best suited for:
Deep red LED filtering, RFP and mCherry fluorescence, red-channel imaging in flow cytometry, warm-tone lighting and projection, and thermal imaging pre-filtering.
Description
The O15808 sets its 50 % cut-on at 565 nm, blocking UV through the green band with deep suppression below 0.4 % from 380 to 544 nm. The passband opens at 573 nm and runs flat to 780 nm with average transmission exceeding 94 %, peaking at 95.7 % near 650 nm. This filter isolates the warm portion of the visible spectrum starting from the yellow-orange boundary, with no UV shoulder or secondary leakage concerns.
Key Advantages
- 565 nm cut-on with clean profile - T50 % at 565 nm with no UV shoulder leak - blocking stays below 0.4 % across the entire rejection band.
- 95.7 % peak with > 94 % average - Flat passband from 573 to 780 nm covering yellow, orange, red, and NIR with minimal ripple.
- Complete UV-green rejection - Average transmission 0.4 % from 380 to 544 nm, providing OD 2+ across the full cool-visible spectrum.
- Hard-oxide durability - Ion-assisted sputtered coating survives thermal cycling, humidity, solvents, and aggressive 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
- Rhodamine & Cy3 emission filtering - Passes orange-red fluorescence emission while blocking 532/561 nm excitation lines with a single filter.
- Sodium line pass filtering - Transmits the 589 nm sodium doublet and all longer wavelengths for sodium vapor analysis and atmospheric studies.
- Machine vision warm-light isolation - Removes green and blue scatter in inspection systems using amber or red LED illumination.
- Photovoltaic characterization - Passes the long-wavelength portion of the solar spectrum for band-gap analysis of silicon and thin-film cells.
- Theatrical & architectural lighting - Creates saturated warm washes from yellow-orange through red with absolute zero cool-tone leakage.
Need the O15808 in a custom size or substrate? KUPO Optics delivers prototypes in days and production volumes on your timeline.
FAQ
O15808 FAQ
What is O15808 and what is it used for?
O15808 is a 565 nm Longpass Filter. The O15808 sets its 50 % cut-on at 565 nm, blocking UV through the green band with deep suppression below 0.4 % from 380 to 544 nm. The passband opens at 573 nm and runs flat to 780 nm with average transmission exceeding 94 %, peaking at 95.7 % near 650 nm. Common uses include Rhodamine & Cy3 emission filtering, Sodium line pass filtering, Machine vision warm-light isolation, and Photovoltaic characterization.
What are the key optical specs of O15808?
Key published specs for O15808 include Passband: 578 – 780 nm, 90.9 – 95.7 % T (± 2.4 % ripple); Cut-on (T50): ≈ 565 nm; Edge steepness: ~28 nm (10 → 90 % transition); Blocking: < 0.93 % T below 525 nm (OD ≥ 2); AOI: 0° (normal incidence); custom angles available.
What applications is O15808 best suited for?
O15808 is commonly used for Rhodamine & Cy3 emission filtering, Sodium line pass filtering, Machine vision warm-light isolation, and Photovoltaic characterization. Rhodamine & Cy3 emission filtering - Passes orange-red fluorescence emission while blocking 532/561 nm excitation lines with a single filter.
Can O15808 be customized for size, substrate, or coating requirements?
KUPO lists the construction for O15808 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 O15808?
The published angle of incidence for O15808 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
