Description

The BP760 is a precision optical filter designed to isolate a specific wavelength range within the visible spectrum. It is engineered for applications requiring a narrow band of transmitted wavelengths with minimal interference from adjacent spectral regions.

Key Specifications:

• Center Wavelength (CWL): 760 nm ±5 nm

  • This indicates that the filter is optimized to transmit light with a central wavelength around 760 nanometers. The ±5 nm specification provides a tolerance range, meaning the effective center wavelength could vary between 755 nm and 765 nm.

• Full Width at Half Maximum (FWHM): 40 nm

  • The FWHM describes the width of the wavelength band that the filter transmits at half of its maximum transmission level. A 40 nm FWHM means that the filter allows light to pass through over a range of 40 nanometers, centered around the 760 nm CWL. This characteristic defines the bandwidth of the filter and how narrow or wide the transmission range is.

Optical Characteristics:

• Transmission: The filter is designed to have high transmission efficiency within the specified bandwidth (760 nm ±20 nm, given the 40 nm FWHM) while significantly attenuating wavelengths outside this range. This ensures that only the desired spectral region passes through the filter with minimal loss and interference.

• Blocking: Outside the 40 nm bandwidth, the filter provides strong blocking to prevent unwanted wavelengths from passing through, thus enhancing the selectivity and precision of the optical system in which it is used.

• Applications:

  • Spectroscopy: Useful for isolating specific wavelengths in spectroscopic measurements.
  • Fluorescence Microscopy: Helps in filtering out specific fluorescence emission spectra while excluding background noise.
  • Imaging Systems: Enhances image contrast by isolating narrow spectral bands of interest.

Construction and Materials:

• Coating: Typically made with advanced coating technologies to achieve high transmission and blocking characteristics. The coatings are usually deposited on substrates like optical glass or quartz.

• Mounting: Can be mounted in optical systems using various holders or mounts designed to secure the filter in place and ensure proper alignment with optical paths.

Physical Dimensions:

• Size and Shape: Filters come in various sizes and shapes depending on the specific application requirements. Common formats include circular or rectangular, with standard diameters or dimensions depending on the optical setup.

• Thickness: The thickness of the filter can affect its optical properties and should be considered when integrating it into optical systems.

Summary

The BP760 narrow bandpass filter is designed for precise wavelength isolation around 760 nm with a 40 nm bandwidth, making it ideal for applications requiring selective transmission of specific spectral regions. Its high transmission within the designated bandwidth and strong blocking outside this range ensure accurate and reliable performance in various optical applications.