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Longpass Filters

Block shortwave light up
to the cut-on-wavelength

 


Looking for high performance longpass filters? Our robust longpass passes only wavelengths above a specified cutoff wavelength and blocks lower wavelengths.


 

Schneider-Kreuznach Longpass Filters

Longpass Filters for the Industry


Schneider-Kreuznach magnetron sputtered industrial longpass filters impress with steep slopes and high transmission at stable cut-on wavelengths. The very flat surface makes them ideal for high end machine vision systems in factory automation. All longpass filters come with superior antireflection coating. Schneider-Kreuznach longpass filters are RoHS conform. Custom sizes are available on request.

What is the function of a longpass filter?
A longpass filter selectively transmits light with longer wavelengths while blocking light with shorter wavelengths. The filter is designed to transmit light that is above a specific wavelength cuton, known as the filter's "cuton wavelength," and to reflect or absorb light that is below this wavelength.

Where is a longpass filter used?
In industrial applications, longpass filters are used to remove unwanted shorter wavelength light from a light source or to separate different wavelengths of light. For example, in fluorescence microscopy, a longpass filter can be used to block the excitation light and allow only the longer wavelength fluorescence emission light to be imaged.
 

KEY FEATURES OF OUR LongPASS FILTERS


  • Average Transmission 95 %: Achieve an impressive average transmission rate of 95 % for optimal light throughput.
  • Steep slopes: Take advantage of steep slopes that allow efficient isolation of specific wavelengths.
  • Wavelength Tolerance +/- 1 %: Experience exceptional accuracy with a wavelength tolerance of +/- 1 %, ensuring precise results.
  • Ultra Low Reflection: They minimize reflections, resulting in better performance of optical systems.
  • Deep Blocking / High Optical Density: Interfering wavelengths are blocked and unwanted stray light is minimized.

 

 

Status
Order name
cut-on Wavelength, 50% [nm]
Type
Filter mounted
Thread size
Filter glass unmounted
Diameter
Color
Request quote
Transmission data
Schneider-Kreuznach Longpass Filter LP 365 (010)
LP 365 E
standard
LP 365 E
365
interference
 width=
Datasheet View all
Schneider-Kreuznach Longpass Filter LP 400 HT
LP 400 HT
on request
LP 400 HT
400
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 430 HT
LP 430 HT
standard
LP 430 HT
430
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 460 HT
LP 460 HT
on request
LP 460 HT
460
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 495 HT
LP 495 HT
on request
LP 495 HT
495
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 515 HT
LP 515 HT
on request
LP 515 HT
515
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 530 HT
LP 530 HT
on request
LP 530 HT
530
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 565 HT
LP 565 HT
on request
LP 565 HT
565
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 590 HT
LP 590 HT
on request
LP 590 HT
590
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 600 (090)
LP 600 E
standard
LP 600 E
600
absorption
 width=
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Schneider-Kreuznach Longpass Filter LP 610 HT
LP 610 HT
on request
LP 610 HT
610
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 625 (091)
LP 625 E
standard
LP 625 E
625
absorption
 width=
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Schneider-Kreuznach Longpass Filter LP 630 HT
LP 630 HT
on request
LP 630 HT
630
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 695 (092)
LP 695
standard
LP 695
695
absorption
 width=
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Schneider-Kreuznach Longpass Filter LP 695 HT
LP 695 HT
on request
LP 695 HT
695
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 725 HT
LP 725 HT
on request
LP 725 HT
725
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 765 HT
LP 765 HT
standard
LP 765 HT
765
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 775 (098)
LP 775
standard
LP 775
775
absorption
 width=20
Datasheet View all
Schneider-Kreuznach Longpass Filter LP 780 HT
LP 780 HT
on request
LP 780 HT
780
interference
 width=
Datasheet View all
Schneider-Kreuznach Longpass Filter LP 820 HT
LP 820 HT
standard
LP 820 HT
820
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 825 (093)
LP 825
standard
LP 825
825
absorption
 width=
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Schneider-Kreuznach Longpass Filter LP 850 HT
LP 850 HT
on request
LP 850 HT
850
interference
 width=
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Schneider-Kreuznach Longpass Filter LP 900 HT
LP 900 HT
standard
LP 900 HT
900
interference
 width=
Datasheet View all

Mounts for longpass filters

C-Mount

Defined by 1” (25.4mm) diameter and 32 turns per inch pitch, C-Mount thread is a popular camera mount in machine vision industry. Schneider-Kreuznach offers for most filters a CMT mount option. So that filters can go in any C-Mount based mechanics in vision systems.

Another popular application, CMT mounts can easyly be used for, is placing a filter in front of the sensor into the camera. The extension of the back flange distance has to be considered for imaging applications.

Key features:
Fits in C-Mount cameras
Black Anodized Brass

Applications:
To be mounted in C-Mount cameras
Vision Systems based on C-Mount mechanics

Thread Diameter Clear Thickness
Aperture
1'' - 32 25.4 mm 21.1 mm 3.6 mm

 

Filter C-Mount

 

 

SH-Mount

Schneider-Kreuznach offers a variety of mounts with common thread sizes to fit on most camera lens systems. SH-Mount is the standard, when high flexibility is needed. Filters are held by retainer rings. SH-Mounts are extreme robust.

All SH-Mounts have a female and male M-thread, and can be stacked if several filters must be combined.

Key features:
Stackable
​​​​​Robust
Black Anodized Brass

Applications:
Mounted on lenses in imaging applications
Mounted on measurement instruments

Thread Diameter Clear Thickness
Aperture
M 25.5x0.5 29.5 mm 20.8mm 6.4 mm
M 27.0x0.5 31.0 mm 21.8 mm 6.4 mm
M 35.5x0.5 39.5 mm 29.8 mm 6.4 mm
M 37.0x0.75 41.0 mm 31.8 mm 6.9 mm
M 39.0x0.5 43.0 mm 33.8 mm 6.4 mm
M 40.5x0.5 44.5 mm 35.8 mm 6.4 mm
M 43.0x0.75 47.0 mm 37.8 mm 6.9 mm
M 46.0x0.75 50.0 mm 40.8 mm 6.9 mm
M 49.0x0.75 53.0 mm 43.8 mm 6.9 mm
M 52.0x0.75 56.0 mm 46.8 mm 6.9 mm
M 55.0x0.75 59.0 mm 49.8 mm 6.9 mm
M 58.0x0.75 62.0 mm 52.8 mm 6.9 mm
M 62.0x0.75 66.0 mm 56.8 mm 6.9 mm
M 67.0x0.75 71.0 mm 61.8 mm 6.9 mm

 

SH Filter-Mount

 

SN1-Mount

SN1-Mount was designed for in machine vision industry popular M30.5x0.5 thread. With its high clear aperture, vignetting can be avoided, even for wide angle applications. The filter is glued into the mount, in order to secure it against vibrations when integrated into robots or production lines. It is ideal to be used in automated fabrication.

SN1-Mounts have a male and female M-thread, and can be stacked if several filters must be combined.

Key features:
Maximum Clear Aperture
No vignetting
Stackable
Robust
Black Anodized Brass

Applications:
Mounted on lenses in imaging applications
Mounted on measurement instruments

Thread Diameter Clear Thickness
Aperture
M 30.5x0.5 32 mm 28 mm 6.5 mm

 

SN1 Filter-Mount

 

 

Product highlights




Longpass Filter - Lp 365

Longpass Filter LP 365


The Schneider-Kreuznach LP 365 color neutral longpass filter, formerly "IF 010", keeps unwanted UV light away from the camera and protects the lens from damage. To achieve color neutrality, the filter transmits the entire VIS range from 365 nm to the NIR range.

 

Request filter


Longpass filter - LP 430

Schneider-Kreuznach Longpass Filter LP 430 HT


The LP 430 is a magnetron sputtered interference filter. It is characterised by steep edges that allow only the desired wavelengths to pass. This blocks interfering light below the cut-off wavelength of 430nm. UV light is excluded. NIR light up to about 2000nm can be transmitted. This filter can be used as a protective glass for VIS-NIR lenses as it allows all relevant wavelengths to pass.

Request filter


Longpass filter - LP 825

Schneider-Kreuznach Longpass Filter LP 825 (093)


The Schneider Kreuznach absorption filter LP 825 blocks all wavelengths below 825 nm and blocks visible light. It allows all wavelengths between 825 nm and 2000 nm to pass. The NIR (near infrared, wavelength ca. 900 nm to 1200 nm) with an average of over 95 %. The filter transmits the SWIR range above this between 1200 nm and 2000 nm with values between 70 % and 80 %.

Request filter


Environmental Facts of the longpass filters


Our industrial optical longpass filters are tested to DIN standards to ensure they meet stringent environmental requirements. These tests check the durability of the longpass filters, their resistance to temperature changes and their ability to withstand exposure to harsh chemicals and other environmental stressors. This ensures that the longpass filters are up to the task in demanding industrial applications, providing consistent performance and reliability over time.

Slow temperature cycling

-25°C - +70°C
5 cycles a 12h

DIN ISO 9022-2-14-03 -1
Damp heat, cyclic

-23°C - +40°C
80% - 95% rel. humidity

DIN ISO 9022-2-16-01-1
Adhesive tape test

<<1 s a 25 mm
jerky pull-off

DIN ISO 9211-4-02-03

Chemical resistant

24 h
45 g NaCl in 1 | deionised water | 23 ± 2°C

DIN ISO 9211-4-04-05

 

Benefits of Schneider-Kreuznach

Tradition meets Innovation: over 110 years of Optical Manufacturing Experience

Ever since the foundation in 1913 our staff have been perfecting our knowledge and technologies to bring you the best products in optics. Our manufacturing facilities in Bad Kreuznach, Germany, guarantee outstanding quality – Made in Germany. We continuously invest in our state-of-the-art machinery and in the education and training of our staff. Select your perfect filter from our large portfolio of optical filters. 

If you need a customized solution, we are your partner from the kick-off to the Project completion. Our extensive experience and in-depth knowledge of a wide range of applications enables us to provide you with solutions that are perfectly tailored to your needs. 

As a family owned company, we are passionate and committed to our customers and their success. You can expect long-term relationships based on trust and shared goals with us.

Custom Optical Filters for maximum Flexibility

We design and manufacture both the mechanics and the coatings of our filters at Schneider-Kreuznach. This enables us to produce customized optical filters that meet your exact requirements and guarantee the highest quality standards.

Improve the performance and accuracy of your machines by using our optical filters. Reduce annoying reflections, minimize unwanted wavelengths, and increase the efficiency of your processes. Our filters are the key to the smooth and efficient operation of your industrial systems. They are durable and robust, ensuring long-term use. 

Contact us to find the right solution for you.

Highest Quality and Reliability: our Filters put to the Test

Quality and reliability are top priorities at Schneider-Kreuznach. Our filters undergo rigorous quality control to ensure maximum reliability. We use only high quality glass from reputable manufacturers to achieve very low manufacturing tolerances. As a result, our filters are of consistently high quality. Their use allows you to accurately reproduce results, as the filters will perform nearly identically even after years of use.

Our industrial optical filters are rigorously tested to DIN and ISO standards to ensure they meet stringent environmental requirements. These tests evaluate their temperature stability and ability to withstand exposure to harsh chemicals and other environmental stressors. As a result, our filters excel in demanding industrial applications, providing consistent performance and reliability over time.

Precision down to the last detail: Our high vertical integration

We are proud of our technical expertise, which we consistently apply to the production of our lenses and optical filters through our high level of vertical integration at our Bad Kreuznach site. Each of the Schneider-Kreuznach products is manufactured with the utmost care and precision to provide you with the best possible performance and reliability.

Optics 

We demand the highest standards of materials and manufacturing processes to ensure excellent image quality, starting with the production of the optics. Our standards go beyond the production of individual components. We master the entire production process from raw glass to finished filters and are able to process all common types of glass. Our special coating technologies give the optics or lenses the desired optical properties.

Mechanics

We do mechanical manufacturing in-house. We use the latest technologies and machinery to develop robust and durable filters. With our high-end 5-axis CNC milling machines, we have world-class machining capabilities that give us exceptional precision and flexibility. These powerful milling machines allow us to realize complex geometries and sophisticated contours in the mechanical components of our filters while maintaining high reproducibility. Electroplating is performed in-house under strict environmental conditions, allowing us to customize the surface coatings of our products to meet the specific requirements of our customers.

Assembly

Our lenses are assembled in dedicated clean rooms that provide a clean and controlled environment and ensure they are free of contaminants. Our qualified staff with many years of experience and expertise perform precise adjustments and calibrate the optics to the highest quality with the lowest tolerances.

Testing and Quality Assurance

Our test technology and quality assurance reflect our high quality standards. We use state-of-the-art technologies such as interferometers and 3D coordinate measurement technology to test the lenses we manufacture to ensure they meet the highest standards. Our ISO 9001 certified processes, metrology rooms and procedures ensure consistent and reliable production to meet our customers' high expectations.

Different needs, individual solutions: Let us advise you

Our sales and engineering professionals provide customers with a high level of expertise and responsiveness. We understand that the needs of our industrial customers can be diverse and complex. Whether it's technical specifications, the exact application environment, special customizations, or other unique requirements, we take the time to understand each customer's unique needs and provide customized solutions.

Our advice ranges from selecting the right filter to assisting with integration into existing systems. You can count on our experts to provide the best support and find the perfect solution. Our in-depth application knowledge and proven optical expertise enable us to provide customized solutions that combine mechanical robustness, reliability and the highest imaging accuracy.

This is the result of our decades of experience with extremely tight tolerances. We even go so far as to design and build our own manufacturing and metrology systems if there is no equipment available on the market that is accurate enough. Our customers value us not only for our technical expertise, but also for the dedicated and customer-focused advice we provide. We listen. We answer questions and make recommendations. It is important to us that our customers have all the information they need so that they can make the right decisions and achieve the best possible results.

Contact us. We will be happy to advise you.

All products at your glance - our digital product brochure (PDF)

Discover our wide range of high quality lenses, optical filters and accessories in our interactive eBrochure. Find the detailed compilation of all standard products currently available from Schneider-Kreuznach.

Our product brochure gives you a comprehensive overview of our entire product range, including all technical information. Whether you are looking for specific products or want to compare different options, our eBrochure has it all in one place.

Click on the link below to download our product brochure.

Produktuebersicht_2022.jpg

Download brochure (PDF)

MORE optical filters


Looking for more ways to optimize your industrial image processing? Check out our full range of optical filters designed to meet the needs of a wide range of industrial applications. Our selection of high quality optical filters can help you achieve outstanding results in challenging environments while protecting your lens.

 

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HEADQUARTERS - Europe

Jos. Schneider Optische Werke GmbH
Ringstraße 132
55543 Bad Kreuznach | Germany
+49 (0) 671 601 0

 

BUSINESS UNITS

Business Unit Industry
+49 (0) 671 601 205
isales@schneiderkreuznach.com

Business Unit Photo/ Cine
+49 (0) 671 601 551

B+W belongs to the Photo division
photo@schneiderkreuznach.com
cine@schneiderkreuznach.com

 

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