1.Product Descriptions:
| Characteristics: | Longpass filters 380-2500nm |
| Type: | Longpass filter |
| Central Wavelength (CWL): | 380-2500nm |
| Transmittance: | >90% or specified |
| Optical Density： | OD2-OD3 |
| Shape: | Round, Square, Custom Shape |
| Surface Quality: | 60/40 scratch-dig |
| Dimension: | specified |
| Thickness: | specified |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified |
| Spectral range: | 350-1100nm |
| Remark： *Customized capability: 380-2500nm, stock for 10nm intervals. **Common for 86x86mm, 80x80mm,other can customized, max: 300x300mm. ***Thickness:0.21、0.3、0.55、0.7、1.0、1.1、2.0、3.0mm…etc. | |
2.What is Longpass filter?
Longpass filters are fundamental and important wavelength-selective components in optical systems. They allow light with wavelengths longer than a specified cut-on wavelength to pass through, while blocking light with wavelengths shorter than that value.
3.What is typical application for Longpass filters?
Longpass filters play a vital role in various fields, include scientific research, industry, and biomedicine. They are widely used in applications such as fluorescence microscopy and imaging, Raman spectroscopy, machine vision and industrial inspection, environmental monitoring and agricultural remote sensing, as well as laser systems.
4.What is key parameter when choose for right Longpass filters?
When selecting the right Longpass Filter for your optical system, it is essential to evaluate the following key parameters to ensure optimal performance. First, cut-on wavelength, choose a cut-on wavelength that is slightly longer than the wavelength you need to block, ensuring your desired signal passes through unaffected. Second, transmission rate. For high-sensitivity applications, look for filters with >90% or even >93% average transmission to maximize signal throughput. Third, blocking depth, higher OD values indicate stronger blocking. Forth, incident angle. Fifth, dimensions and substrate material.
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical technology that apply depositing nanomaterials through ion-assisted evaporation onto a multilayer hard film in a high vacuum environment which coating layer is firm and has good tightness, and small bandwidth drift. Liyuan optoelectronics have been focus on optical coating for more than 17 years and offer one-stop optical filters solution including Narrow Bandpass Filters, IR cut-off Filters, Longpass & Short Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
other Longpass filters in stock from Liyuan Optoelectronics: LP430 LP500 LP560 LP600 LP650 LP800, etc.
