Home » NIR, IR450 , 450nm Infrared cut-off Filter, AR coated, Shortpass Filter for fluorescence, spectroscopy, imaging, and machine vision applications

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NIR, IR450 , 450nm Infrared cut-off Filter, AR coated, Shortpass Filter for fluorescence, spectroscopy, imaging, and machine vision applications

Product features

● Narrow transition zone slope less than 20nm transmission

● High transmittance over 90% or higher

● Deep cutoff depth OD2-OD3 or customized

●Multiple substrates available

●Customization supported

Product Detail

1.Product Descriptions：

Characteristics:	450nm IR Cut-Off Filter
Type:	Interference type filter
Cut-off Wavelength(in nm):	450 nm
Average Transmittance(%) :
Optical Density (OD):	OD2-OD3
Color:	Blue
Surface Quality:	60/40 scratch-dig
Dimension(mm):	Standard for 86x86mm, 80x80mm, other can customized, max. 300x300mm
Thickness(mm):	Available: 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: Spectral range:380-1100nm

2.Measured Spectral measurement

Picture 1: IR450nm Spectral measurement

3.What is typical application for 450nm IR Cut-Off Filters?

The 450nm IR cut-off filter, also known as a 450nm shortpass pass filter, is an interference-type optical filter that efficiently transmits short-wavelength light below 450nm while blocking long-wavelength light above 450nm.

450nm IR Cut-Off Filters find extensive application across various fields:

Fluorescence Microscopy & Analysis: serves as an emission filter to effectively separate excitation light from fluorescence signals.
Spectroscopy & Chemical Analysis: applied in spectrometers, clinical chemistry testing, and other instruments to extract optical signals within specific wavelength bands.
Imaging Systems: used in digital cameras and surveillance cameras to eliminate the response of CCD/CMOS sensors to near-infrared light and correct color rendition.
Machine Vision & Stage Lighting: employed to remove stray or interfering light, or used as a dichroic mirror.

5.What is key parameter when choose for suitable IR cut-off Filter?

When selecting IR cut-off filters, normally the following factors need to be taken into consideration：

Cut-off Wavelength: refers to the designated intermediated wavelength (e.g. 650nm) at transition from transmission to reflective zone, and measure at 50% transmittance.
Peak or Average Transmittance(in %): typically ≥90%, Higher transmittance might need Anti-reflective(AR) coating.
Blocking rate: usually in terms of optical density(OD), OD2-OD3 for standard and higher blocking rate 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:

IR650 , 650nm Infrared cut-off Filter, Lens Filter, 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: 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.