Product Descriptions:
| Product name: | Laminated absorptive bandpass filter |
| Type: | Sandwich construction Interlayer: Absorptive type blue glass Upper & Lower: Interference type Bandpass Filter |
| Central Wavelength (CWL): | 470nm |
| Full Width at Half Maximum(FWHM): | 40nm |
| Optical Density (OD): | OD2 |
| Shape: | Square or customized |
| Angle of Incidence(AOI): | 0°or specified |
| Surface Quality: | 60/40 scratch-dig |
| Dimension(mm): | Customized |
| Thickness(mm): | Customized |
| Substrate: | Optical Glass + Blue Glass + Optical Glass |
| Remark: Spectral range:380-1100nm | |
What is a laminated optical filter?
A laminated filter is a kind of optical filter component formed by glued two or more filter lenses together using an optical adhesive such as UV glue. Its purpose is to achieve specific filter functions through spectral superposition. Common laminated filters include Cut-off type colored glass and coated band pass filters, polarizing filters and coated AR (anti-reflective) filter glass, etc.
What is typical application for bandpass filter and red glass laminated filters?
For bandpass and red glass laminated filters, the red glass laminated filter acts as a pre‑filter for coarse filtration. It first absorbs ultraviolet and blue‑green light, and the bandpass filter then performs fine wavelength selection to produce high‑purity red or near‑infrared monochromatic light. This filter combination finds wide use in fluorescence detection, red‑light spectral measurement, and machine‑vision imaging systems.
Related products:
BG39, BG40 Blue Glass, Selective Absorption Type, NIR Cut-off Color Filter Glass
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical technology that apply depositing nano materials 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.
