Introducing the Bentham FCH Fiber-Coupled Optical Homogenizer
Bentham is pleased to announce the launch of the FCH Fiber-Coupled Optical Homogenizer, a high-throughput optical system for generating large, square, spatially uniform illumination fields from fiber-coupled light sources.
The FCH uses a microlens-array-based optical design to convert broadband or monochromatic fiber input into a flat-top illumination field at the working plane. It is designed for applications requiring both high irradiance and high spatial uniformity, including detector characterization, camera and image-sensor testing, hyperspectral imager calibration, solar-cell QE/EQE measurement, and related sample-plane illumination tasks.
Key features include:
- 200 nm to 2.5 µm spectral range
- 60 mm × 60 mm or 120 mm × 120 mm square projected fields
- U2 ≥ 98% spatial uniformity across the projected field
- Large contiguous regions achieving U2 ≥ 99% uniformity
- Typical optical throughput of 50% at 550 nm
- Single-input or motorized dual-input configurations
- Compatibility with standard 0.22 NA multimode fiber
- SMA-905, FC-PC, and custom fiber interface options
The FCH is especially well matched to Bentham fiber-coupled tunable light-source systems, including high-brightness xenon source-based systems, supercontinuum-laser systems, high-efficiency fiber-to-fiber monochromators, and direct fiber-coupled LED, laser, and broadband sources.
Download the datasheet for a concise product introduction.
About Bentham
Bentham manufactures accurate, reliable instrumentation for the optical characterization of light sources, detectors, and materials. Bentham’s state-of-the-art light measurement solutions employ the very latest advances in optomechanics and electronics.
Their product categories include:
- Systems to Evaluate Detectors – Systems for opto-electronic testing of photodetectors and image sensors
- Systems to Measure Optical Properties of Materials – Spectrophotometers and fluorometers probing a wide range of products and materials
- Systems for Source Characterization – Spectroradiometers characterizing UV-vis-IR source emission
- Monochromators – Comprehensive portfolio of precise monochromators built for measurement confidence across the UV-visible-IR ranges
- Broadband Light Sources – Complete range of high stability sources to match the spectral range of your application, including single emitter and dual emitter light sources as well as power supplies
- Tuneable Light Sources – Plug-and-play, wavelength-agile, application-ready monochromatic tuneable light sources
- Detectors – Selection of detectors to suit all signal levels and spectral ranges
- Detection Electronics – Suite of detection electronics to ensure optimal detector performance and signal recovery
- Calibration Standards – Equipment for calibrating light sources, detectors, and reflectance
- Entrance Optics – Ensures light collection in correct geometry for analysis by spectroradiometer (devices to measure irradiance, radiance & radiant intensity, and radiant flux)
- Measurement Accessories – Range of accessories to deliver light appropriately for each type of measurement. Devices include: collimators, integrating spheres, fiber optic bundles, and beam homogenizers
- Software – Comprehensive software suite for the optimal operation of Bentham’s high performance light measurement components and systems
To request more information or a quotation for Bentham products, contact IL Photonics.

