Products Description
LP500nm Longpass Filter | High Transmission 500-800nm, Deep UV Blocking
The OPTOStokes LP500nm longpass filter is a high-performance edge filter designed for precision optical systems requiring sharp spectral transitions and exceptional stray light rejection. Engineered with a cut-on wavelength at 500nm, this optical filter delivers a peak transmission exceeding 90% across the 500nm to 800nm spectral band. Crucially, it provides ultra-deep out-of-band blocking up to Optical Density 6 (OD > 6) at the 266nm laser line, and OD > 4 across the critical 200–270nm and 280–480nm UV-visible bands, ensuring a high signal-to-noise ratio in advanced optoelectronic setups.
Technical Specifications
| Optical Parameter | Specification Value |
|---|---|
| Cut-on Wavelength | 500 nm |
| Passband Transmission Range | 500 - 800 nm at T > 90% |
| Ultraviolet Blocking Range | 200 - 270 nm at OD > 4 |
| Laser Line Rejection | 266 nm at OD > 6 |
| Visible Rejection Range | 280 - 480 nm at OD > 4 |
| Substrate Type / Coating | Hard-coated, Single-substrate Interference |
Applications in Bio-Medical and Laser Systems
Due to its high transmission of yellow-green and red spectral emissions alongside excellent deep-UV attenuation, the LP500nm filter is heavily utilized as a fluorescence emission filter. It effectively isolates specific fluorophore responses while entirely suppressing the intense scatter from 266nm or 355nm excitation lasers. This makes this specialized longpass filter highly effective for real-time agricultural and food inspection systems, environmental water purity monitoring, flow cytometry, and industrial Raman spectroscopy pipelines where optical crosstalk cannot be tolerated.
Customization Capabilities and OEM Services
OPTOStokes provides end-to-end manufacturing flexibility to support both prototyping and high-volume industrial deployment. We support comprehensive edge cutting and resizing capabilities, allowing the LP500nm substrate to be shaped into precision square, circular, or bespoke geometric footprints matching your optomechanical enclosure. Additionally, filters can be integration-ready by being mounted into black anodized aluminum unthreaded or threaded rings. Our massive in-stock selection ensures predictable production schedules without compromising on international quality standards.
Overcome Optical Crosstalk Constraints
Optical design engineers and purchasing leads frequently face system failures stemming from poor substrate durability, out-of-band leakage, or volatile supply chains. In fluorescence and laser analysis, even minor UV leakage can saturate delicate sensors and ruin measurement accuracy. OPTOStokes resolves these problems by providing world-class thin-film hard coatings that guarantee strict spectral reliability under harsh conditions. Contact our technical sales engineering division today at sales@optofilters.com or submit your custom specifications through our web portal to get an expedited quotation.
Tags: fluorescence imaging OPTOStokes longpass filter 500nm filter laser blocking
