THORLABS FELH1100 Longpass Filter Wavelength 25.0MM 1100NM

( Brand: Thorlabs ), ( Part Type: Filter ), ( Manufacturer Part Number: FELH1100 )

Review THORLABS 25.0mm Longpass Filter Cut on Wavelength 1100nm

The Thorlabs FELH1100 is a high-quality 25.0mm longpass filter designed for use in optical applications where light with a wavelength of 1100nm is to be transmitted, while shorter wavelengths are blocked. This filter is an essential component for various applications in the field of infrared spectroscopy, laser systems, and optical communications.

The FELH1100 is manufactured using Schott BG39 glass, which is known for its excellent transmission in the near-infrared region. The filter has a cut-on wavelength of 1100nm, meaning that it begins to transmit light effectively at this wavelength. The transmission peak of the filter is located around this wavelength, providing maximum transmission for infrared light in this range.

The filter is designed with a high optical density to effectively block any light with wavelengths shorter than the cut-on wavelength. This characteristic makes it ideal for applications where it is necessary to isolate and work with infrared light while preventing the entry of visible or ultraviolet light.

The FELH1100 is available in two popular sizes: 25.4mm x 25.4mm and 36mm x 36mm. The filter is also available in various thicknesses to suit different application requirements. The edge thickness tolerance is specified as 0.15mm for the 25.4mm x 25.4mm size and 0.25mm for the 36mm x 36mm size.

The filter is shipped in a protective packaging to ensure safe transportation. It is recommended to handle the filter with care to avoid any potential damage to the coating or the glass itself. The filter should be cleaned using appropriate methods, such as gentle wiping with a soft lens cloth or a commercial filter cleaning solution.

In conclusion, the Thorlabs FELH1100 is a high-performance longpass filter specifically designed for applications involving infrared light with a wavelength of 1100nm. Its excellent transmission properties, combined with its ability to effectively block shorter wavelengths, make it an indispensable tool in various scientific, industrial, and research applications.

The Thorlabs FELH1100 25.0mm Longpass Filter is designed for use in infrared applications. This filter allows light with wavelengths longer than 1100nm to pass through, while blocking shorter wavelengths. Here are some pros and cons that may help you make a decision about purchasing this filter:

1. High Transmission: This filter has a high transmission rate for wavelengths longer than 1100nm, making it an ideal choice for infrared applications.

2. Durable: Thorlabs filters are known for their durability and high optical quality. This filter is no exception, as it is made of Schott BK7 glass and has a rugged aluminum housing.

3. Versatile: The 25.0mm diameter makes this filter suitable for use in various applications, including spectroscopy, laser systems, and imaging systems.

4. Low Absorption: The filter has low absorption in the passband, which helps to minimize the loss of light and maintain high sensitivity in infrared applications.

1. Expensive: Compared to other filters with similar specifications, this filter may be more expensive due to its high-quality materials and advanced design.

2. Limited Wavelength Range: While this filter is effective for wavelengths longer than 1100nm, it may not be suitable for applications that require the transmission of shorter wavelengths.

3. Heavy: Due to its rugged aluminum housing and large diameter, this filter may be heavier than some other filters, which could be a consideration for portable or handheld applications.

In conclusion, the Thorlabs FELH1100 25.0mm Longpass Filter is a high-quality, durable, and versatile option for infrared applications that require the transmission of wavelengths longer than 1100nm. Its high transmission rate, low absorption, and rugged design make it a valuable tool for researchers, engineers, and scientists working in the field of infrared spectroscopy, laser systems, and imaging systems. However, its high cost and limited wavelength range may be a consideration for some users. Ultimately, the decision to purchase this filter depends on the specific requirements of your application and your budget. If you need a high-performance filter for infrared applications, then this filter is a great option to consider.

Details:

Photos are of the actual unit for sale. If a custom power cord or AC adapter is required for the item, it only included if pictured described above. Item will come with a 30 Day Warranty. Privacy: Rest assured your information will not be given, sold, rented or loaned to any third party.

Includes Longpass Filter Cut-On Wave length as pictured. Cosmetically in good condition showing minor scuffs / scratches blemishes from previous use. Item was recently removed from working service and is in excellent order. Shipping Details: originates from zip code 95742.

part #: felh1100 prices

• $36.00-$79.99

specifications quakedental:

• brand: Thorlabs
• part type: Filter
• manufacturer part number: FELH1100

general quakedental:

• Business Industrial > Healthcare, Lab Dental > Other Healthcare, Lab Dental
• condition: Used

returns quakedental:

• policy: Returns Accepted
• time: 30 Days
• method: Money back
• paid by: Seller

shipping quakedental:

• type: Fixed
• transit: 4-10 Days
• class: Standard, Expedited, One-day
• service: Standard, Expedited, Overnight
• cost: $0.00

offer quakedental:

• sold: 0
• started: June 29, 2025
• availability: In Stock
• quantity: 1
• options: Ship-to-home

payments quakedental:

• wallet: Google-pay
• credit card: Mastercard
• other

seller quakedental:

• rating: 99.8%
• # reviews: 35595
• city: Rancho Cordova, California

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