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600nm Longpass Filter,LP60nm Long-wavelength pass Filter,Support customized

Product features

● Narrow transition zone slope less than 20nm transmission.

● High transmittance over 90% or higher

● Deep cutoff depth OD2-OD4 or customized

● Superior quality glass material

● Vacuum deposition hard membrane layer

Product Detail

Product Descriptions

Characteristics:	600nm Longpass Filter
Type:	Interference filter
Cut-off Wavelength(CWL):	600nm ±5nm
Average Transmittance(%) :	>95%
Optical Density (OD):	OD2
Shape:	Round, Square or customized
Color:	Red
Surface Quality:	60/40 scratch-dig
Dimension(mm):	Customized*
Thickness(mm):	Customized**
Substrate:	Optical Glass ***
Remark：Spectral range:350-1100nm Size customized: 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. ** Available for: Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified material.

Measured Spectral curve

Picture 1: LP600nm Spectral Curve

What is typical application for 600nm longpass filter?

A 600nm longpass filter is an optical component that efficiently transmits light with wavelengths greater than 600nm while blocking light with wavelengths shorter than 600 nm.

Typical applications of 600nm longpass filters include:

Fluorescence Microscopy & Spectral Analysis: One of the most common applications. Used in fluorescence microscopes to separate excitation light from emitted fluorescence signals, improving image signal-to-noise ratio. Also used in flow cytometers to filter background noise, or in spectrometers for optical signal sorting and selective bandpass filtering.
Biometrics & Security Surveillance: In facial recognition time clocks and iris recognition systems, it filters out ambient light interference to improve recognition accuracy. Also used in security surveillance cameras to enhance imaging performance under complex lighting conditions.
Laser Technology & Optical Communications: Used for laser line cleanup to purify laser beams and remove stray light. Can also serve as a beam splitter to separate or combine different wavelength lasers in optical paths. In optical communication systems, it filters out noise and interfering signals.
Machine Vision & Industrial Inspection: In industrial machine vision systems, it helps cameras capture specific wavelengths of light for quality inspection or feature recognition. Also used in infrared touchscreens, infrared electronic whiteboards, and similar devices.
Photography, Stage Lighting & Aesthetic Equipment: Used in stage lighting effects to produce specific colors or remove unwanted hues. Also applied in aesthetic medical devices such as IPL photofacials, laser hair removal to selectively target specific skin conditions.

What is key parameter when choose for right Longpass Filter?

When selecting a Longpass Filter, normally the following factors need to be taken into consideration：

Cut-Off Wavelength: it is one of the most important parameters, typically defined as the wavelength transmittance at 50% .
Average or Peak transmittance: usually average transmittance ≥90%, higher transmittance e.g. 92% or 95% on average or specific single point need to definite and communicate with manufacturer, higher transmittance need to additional AR coating.
Blocking rate: usually expressed 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 consider 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.

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.

other Longpass filters in stock from Liyuan Optoelectronics: LP430 LP500 LP560 LP600 LP650 LP800, etc.