590nm Bandpass Filter, 590nm CWL,20/25/45nm FWHM, Support Customized

1.Product Descriptions:

Characteristics:	590nm Bandpass Filter
Type:	Interference type filter
Central Wavelength (CWL):	590+-5nm
Full Width at Half Maximum(FWHM):	20/25/45nm
Peak Transmittance(%) :	>88%
Surface Quality:	60/40 scratch-dig
Optical Density (OD):	OD2-OD3
Color:	Yellow
Shape：	Square, Round, Irregular Shape
Dimension(mm):	specified**
Thickness(mm):	0.21-0.3mm
Substrate:	Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified
Remark： Spectral range:350-1100nm *Customized capability: 380-2500nm, stock for 10nm intervals. **Common for 86x86mm, 80x80mm, other can customized, max. 300x300mm *** Thickness available: 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc.

2.Measured Spectral Graph – 590nm Bandpass filter:

Picture 1: BP590-20nm Spectral Graph measurement

Picture 2: BP590-25nm Spectral Graph measurement

Picture 3: BP590-45nm Spectral Graph measurement

3.What is typical application for 590nm bandpass filters?

A 590nm bandpass filter is a precision optical element that only allows light around 590nm to pass through, while blocking all other wavelengths outside this narrow spectral range. Typical applications of 590nm Bandpass Filter:

• Fluorescence Detection & Analysis: Serves as an emission filter to isolate the emission signals of fluorescent dyes such as Cy3 and block excitation light. Used in fluorescence microscopy imaging, flow cytometry, gel imaging systems, and microplate readers or biochemical analysis.
• Industrial Vision & Color Sorting: Enhances contrast of specific colors to aid automated inspection.
• Spectroscopy Analysis & Detection: Used in spectrometers or photometers as a pre-filter or analysis channel filter to select the spectral range around 590nm for measurement; integrated into optical sensors for broadband signal sensing.
• Medical & Aesthetics: Used in infrared medical instruments, fluorescence analyzers, PCR fluorescence detection and other equipment to precisely isolate target optical signals; in IPL photorejuvenation devices, the 590nm band can target specific skin concerns such as red blood vessel removal.

4.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:

450nm Bandpass Filter, 450nm CWL, 30/45/50nm 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. Besides, Liyuan optoelectronics 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: The appearance color of the optical filter is usually determined by the spectral parameters, the interference type filter varies at different angles, and the pictures in this link may have been taken from different angles, so the actual color should be based on the final spectral parameters required！