Neutral Density Filters
Reduce brightness without effecting the colors
Looking for high performance neutral density filters? Our ND filters uniformly reduce all wavelengths of light without affecting color fidelity, thereby reducing light intensity.
Neutral Density filters for the industry
Schneider-Kreuznach Neutral Density filters reduce evenly the transmittance of light over the entire VIS spectrum. They decrease the brightness of an image without changing the depth of field (DoF). They attenuate light by absorbing a part of the energy of the VIS wavelength, without influence on the color balance.
What is the function of a neutral density filter?
A neutral density (ND) filter reduces the intensity of light across the entire visible spectrum without altering its color or wavelength distribution. The filter achieves this by absorbing or reflecting a portion of the incident light, allowing only a reduced intensity od light to pass through.
Where is a neutral density filter used?
ND filters are used in laser applications to attenuate the light beam, thereby reducing its power without affecting its characteristics. They can be used in optical instruments to attenuate the light intensity, enabling measurements at different light intensities without having to change the light source or the instrument settings.
KEY FEATURES OF OUR Neutral Density FILTERS
- Insensitive to angle of incidence: Consistent performance regardless of light angle.
- Decrease brightness without changing depth of field: Reduce light while maintaining depth of field.
- Stackable, combine ND-filters to achieve optical density: Flexibly adjust light intensity.
- Even attenuate avoid effects on color balance: Control brightness without color distortion.
Status
Order name
Optical Density
Transmission Average [%]
Filter mounted
Thread size
Thread size
Filter glass unmounted
Diameter
Diameter
Color
Transmission data
Mounts for neutral density 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 |
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 |
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 |
Product Highlights
Neutral Density filters -
ND 0.6-3.0
Neutral density filters, or ND filters for short, are used to control luminous flux. A color-neutral layer is deposited on a glass substrate, which allows less light to pass through but does not affect color or contrast. ND filters are available in densities ranging from 0.6 to 3.0, i.e. 0.6 reduces transmission to 25% and 3.0 reduces transmission to 0.15%.
Environmental Facts of the neutral density filters
Our industrial optical neutral density filters are tested to DIN standards to ensure they meet stringent environmental requirements. These tests check the durability of the neutral density filters, their resistance to temperature changes and their ability to withstand exposure to harsh chemicals and other environmental stressors. This ensures that the neutral density 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 12hDIN 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-offDIN ISO 9211-4-02-03
- Chemical resistant
- 24 h
45 g NaCl in 1 | deionised water | 23 ± 2°CDIN 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.
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
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55543 Bad Kreuznach | Germany
+49 (0) 671 601 0
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+49 (0) 671 601 205
isales@schneiderkreuznach.com
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cine@schneiderkreuznach.com
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