Product Descriptions:
| Characteristics: | LP470 Sapphire Optical Filter |
| Type: | Longpass filter |
| Central Wavelength (CWL): | 470nm ±5nm |
| Transmittance: | >92% or specified |
| Optical Density： | OD2-OD6 |
| Surface Quality: | 60/40、80/20 scratch-dig |
| Color: | Yellow |
| Shape: | Round, Square, Custom Shape |
| Dimension: | 61*56mm or Customized |
| Thickness: | 0.55mm or customized |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified |
| Spectral range: | 380-1100nm |
| Remark：(1) Customized capability: 380-2500nm, stock for 10nm intervals. (2) Common for 86x86mm, 80x80mm, other can customized, max. 300x300mm (3) Thickness available: 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc. | |
Measured Spectral Graph:
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| Picture 1: LP470nm Spectral measurements |
What is 470nm longpass filter?
A 470nm longpass filter is an optical edge filter that blocks all light wavelengths below 470 nm and allows visible and near-infrared light above 470 nm to pass through efficiently.
What is typical application for 470nm longpass filter?
What is key parameter when choose for right Longpass filters?
When selecting a Longpass Filter, you must consider multiple factors. First, the cut-on wavelength is one of the most important parameters, typically defined as the wavelength at 50% transmittance. Second, you should evaluate the transmittance, usually selecting products with transmittance >90%. Third, consider the blocking depth (optical density). Fourth, examine the transition band steepness, a narrower transition band provides stronger resolution for differentiating wavelengths. Fifth, you must clarify whether the optical path requires 0° (normal incidence) or 45° incidence. Sixth, determine the blocking range and pass band range. Additionally, you need to consider physical and environmental specifications such as substrate type, dimensions and thickness, surface quality, and environmental durability.
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 Fitlers, 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.
