Product Descriptions:
| Characteristics: | RGB splice optical bandpass filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 460nm, 530nm and 650nm |
| Full Width at Half Maximum(FWHM): | 10-60nm |
| Peak Transmittance(%) : | >90% |
| Surface Quality: | 60/40 scratch-dig |
| Optical Density (OD): | OD2 |
| Color: | Red,Blue and Green three color |
| Shape： | Round or customized |
| Dimension(mm): | Customized, max. 300x300mm |
| Thickness(mm): | 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc. |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark：Support customized for wavelength from 200-2000nm. | |
What is RGB optical filter?
An RGB filter is an optical filter that allows only three specific bands of visible light—red (R), green (G), and blue (B)—to pass through separately.
It usually relies on dye/pigment absorption or interference thin-film designs. In systems such as CMOS/CCD image sensors, liquid crystal displays, projection, and illumination color separation, it forms a microscopic array corresponding to pixels , so that each subpixel primarily receives one primary color of light, and signal processing then synthesizes a richly colored image.
What are key parameters when choose for a suitable bandpass filter?
When selecting a Narrow Bandpass Filter, normally the following factors need to be taken into consideration：
- Central Wavelength (CWL)：CWL is one of key parameter to designate first, it refer to the central wavelength at stable high transmission rate passband.
- Peak or Average Transmittance: typically ≥90%, Higher transmittance might need Anti-reflective(AR) coating.
- Full width at half maximum (FWHM): FWHM refer to the interval between the two wavelength points where the transmittance rate reaches 50%.
- Blocking rate: usually in terms of optical density(OD), OD2-OD3 for standard and higher will be OD4-OD6 per requirement.
- Angle of Incidence (AOI): AOI need to be considered as Interference Filter is angle sensitive, 0° AOI by default, other AOI e.g. 30/45° need to be specified.
- Physical and environmental requirement: Substrate type, dimensions and thickness, surface quality, and environmental durability.
Related products:
460nm Bandpass Filter, AR+AF coating, 460nm CWL, 60nm FWHM, OD2,Support customized
530nm Bandpass Filter, 530nm CWL, 20/40/90nm FWHM, Support Customized
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical vacuum 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. The company have been focus on optical coating for more than 17 years ,and the company offer one-stop optical filters solution including Narrow Bandpass Filters, IR cut-off Filters, Longpass Filters, Shortpass Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
Remark：Because the interference type filter varies its performance at different angles, the spectral parameters usually determine its appearance color; moreover, the pictures in this link may originate from various shooting angles, so the actual color should therefore rely on the final spectral parameters required as the standard.
