IR650 , 650nm Infrared cut-off Filter, Lens Filter, Support Customized

Product features

● Narrow transition zone slope less than 20nm transmission

● High transmittance over 90% or higher

● Deep cutoff depth OD2-OD3 or customized

● Widely used for optical lens, camera, laser sensing

Product Detail

Product Descriptions：

Characteristics:	IR650 cut-off filter
Type:	Shortpass Filter
Cut-off Wavelength(in mm):	650nm ± 10nm
Peak Transmittance(%) :	>90%
Optical Density (OD):	OD 2 – OD 3
Shape:	Round, Square or Custom Shape
Color:	Cyan
Surface Quality:	60/40 scratch-dig
Dimension(mm):	Specified**
Thickness(mm):	specified
Substrate:	K9, BK7
Remark： (1)Spectral range:380-1100nm (2) Size customized: 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 measurement

Picture 1: IR650nm Spectral measurement

What is IR650 cut-off filter?

An IR650 cut-off filter is a type of shortpass filter that transmits visible light while blocking near-infrared light. The “650” typically refers to its cut-off wavelength, which in optical terms is usually defined as the point where transmittance drops to 50%. For an IR650 cut-off filter, visible light with wavelengths shorter than 650nm passes through efficiently in the transmission band, while infrared light with wavelengths longer than 650nm is strongly blocked in the cut-off band.

What is typical application for IR650 cut-off filter?

The application areas of IR650 cut-off filters are very extensive. Among them, security surveillance and imaging devices represent the core application areas of IR650 filters, as they mainly address the problem of color distortion caused by image sensors being sensitive to infrared light. In industrial inspection and scientific research, engineers primarily use them for machine vision, medical and scientific research, and spectral analysis. In professional security and special applications, professionals mainly use them for security identification, cultural relic authentication, and entertainment display.

What is key parameter when choose for IR650 cut-off filter?

When selecting an IR650 cut-off filter, you need to consider multiple dimensions such as application scenarios, spectral performance indicators, physical characteristics, environmental reliability, and cost. Typically, the visible light transmittance should be ≥90%, reaching 95% after coating, the infrared blocking depth should be OD≥3, and the narrower the transition band, the better. You should choose between absorption-type or reflection-type filters based on different application scenarios. At the same time, you also need to consider the effects of size and incidence angle, as the cutoff wavelength of interference filters will shift toward shorter wavelengths at large angles of incidence.

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 IR cut-off filters in stock from Liyuan Optoelectronics: IR600 IR630 IR650 IR680 IR700 IR730 IR750…etc.