THORLABS NE501B Unmounted Absorptive Filter Od 1/2 0.1

( Brand: Thorlabs ), ( Part Type: Filter ), ( Manufacturer Part Number: NE501B )

Review THORLABS Qty New Unmounted 1/2 Inch Absorptive Nd Filter Od 0.1

The Thorlabs NE501B is an unmounted, 1/2 wave length ( /2), absorptive neutral density (ND) filter with an optical density (OD) of 0.1. This filter is designed to reduce the amount of light passing through it without altering the wavelength composition of the light.

The NE501B is made of high-quality Schott glass with a homogeneous absorption coating applied on the surface. The absorptive coating reduces the transmission of light while maintaining excellent optical flatness and parallelism. The filter is unmounted, allowing it to be easily integrated into various imaging and optical systems.

The /2 designation indicates that this filter has a thickness that is a half wavelength of light at the intended application wavelength. This property ensures that the filter does not introduce any significant phase shift to the light, making it an excellent choice for applications where the preservation of the original phase is crucial.

The NE501B has an optical density (OD) of 0.1, which corresponds to a transmission loss of approximately 10%. This filter is ideal for applications where a modest reduction in light intensity is required while maintaining a high level of transparency.

The filter is available in various sizes, including 25.4mm x 25.4mm, 50.8mm x 50.8mm, and 75.6mm x 75.6mm. The exact size should be specified during the order process to ensure the correct filter is delivered.

Overall, the NE501B unmounted 1/2 wave length absorptive ND filter from Thorlabs is an excellent choice for applications where a modest reduction in light intensity is required without altering the wavelength composition of the light. Its high-quality Schott glass and homogeneous absorption coating ensure excellent optical performance and reliability.

Pros and Cons of Buying Thorlabs NE501B Unmounted 1/2 Absorptive ND Filter (OD 0.1)

a. High-Quality Filter: The Thorlabs NE501B filter is known for its excellent optical quality and uniform density. This ensures accurate and reliable absorption of light.

b. Versatile: The 1/2 unmounted format allows users to easily mount the filter in various filter holder systems, offering flexibility in different applications.

c. Durable: The filter is made with high-quality materials, ensuring durability and long-lasting performance.

d. Ideal for Specific Applications: This ND filter specifically absorbs 1.0 OD of light, making it suitable for specific applications that require moderate to high light reduction.

a. Cost: Compared to other ND filters or filter sets, the NE501B can be more expensive for a single filter.

b. Manual Mounting: Users need to manually mount the filter in their filter holder systems, which may take additional time and effort.

c. Limited Filter Set: This filter only provides 1.0 OD of absorption, which may not be sufficient for some applications requiring greater light reduction.

The Thorlabs NE501B unmounted 1/2 absorptive ND filter (OD 0.1) offers several advantages, such as high-quality materials, versatile format, and durability. However, it also comes with some drawbacks, including a higher cost and the need for manual mounting.

If you have specific applications that require moderate to high light reduction, this filter is an excellent choice due to its high-quality optical coatings and uniform density. Additionally, its versatile format allows it to be used in various filter holder systems.

However, if you need a more comprehensive filter set or are on a budget, this single filter may not be the most cost-effective solution. In such cases, it might be beneficial to consider other filter sets or options that offer more ODs at a lower cost per unit.

For researchers, scientists, or professionals working in fields that require precise light control and moderate to high light reduction, the Thorlabs NE501B unmounted 1/2 absorptive ND filter (OD 0.1) is an excellent investment due to its high-quality optical coatings, uniform density, and versatile format. However, if you are looking for a more cost-effective solution or need a broader range of ODs, you may consider other filter sets or options that cater to your specific requirements.

Details:

Lot of seven 7 Thorlabs NE501B - Unmounted 1/2 Absorptive ND Filter, Optical Density: 0.1. NEW in original sealed boxes.

part #: ne501b prices

• $9.95-$69.00

specifications detectoimage:

• brand: Thorlabs
• part type: Filter
• manufacturer part number: NE501B

general detectoimage:

• condition: New
• Test, Measurement Inspection > Cameras Imaging > Other Cameras Imaging

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• # reviews: 420
• rating: 100.0%
• city: Oakland, California

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• policy: No Returns

shipping detectoimage:

• service: USPS Ground Advantage
• class: Standard
• type: Calculated
• cost: $7.15
• transit: 4-10 Days
• carrier: USPS

offer detectoimage:

• started: July 8, 2025
• best offers: True
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home

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