Accessibility Links

Skip to main content Accessibility help
Accessibility feedback
Quick Settings
Sign in

Filters and Topics

Search Results

AI Overview

AI Overview
Lentille convexe vs lentille concave
A plan-concave lens made of calcium fluoride (CaF2) is an optical lens with one flat surface and one concave (inwardly curved) surface, designed to diverge light rays . Calcium fluoride is a material chosen for its excellent transmission properties across a wide range of wavelengths, particularly in the ultraviolet (UV) and infrared (IR) spectrum.
Here's a more detailed explanation:
  • Plan-concave lens:
    This type of lens is thinner at the center than at the edges, causing it to spread out light rays that pass through it.
  • Calcium Fluoride (CaF2):
    This material is transparent and exhibits low absorption across a broad spectrum, making it suitable for both UV and IR applications.
  • Applications:
    Plan-concave lenses made of CaF2 are used in various optical systems, including:
    • Spectroscopy: CaF2 lenses are used in spectrometers to direct and focus light beams during spectral analysis.
    • Infrared imaging: Their transparency in the IR range makes them valuable components in thermal imaging systems.
    • Laser systems: CaF2's high damage threshold makes it suitable for use with high-power lasers.
    • Other applications: They can also be found in imaging systems and various other optical setups requiring specific wavelength transmission.
  • Coatings:
    While CaF2 has a relatively low refractive index and might not always require anti-reflection coatings, they are often used to further optimize performance for specific wavelength ranges, according to Thorlabs and Edmund Optics .
  • Optiques en Fluorure de Calcium - Edmund Optics
    Calcium Fluoride (CaF2) Optical Components are used as spectroscopic windows or lenses, or in cryogenically cooled thermal imaging...
    Edmund Optics
  • Calcium Fluoride Bi-Concave Lenses - Thorlabs
Dive deeper in AI Mode
AI responses may include mistakes. Learn more
Positive feedback
Negative feedback
Google apps
AI overview is ready
Dive deeper in AI Mode
AI responses may include mistakes. Learn more
Positive feedback
Negative feedback

Page Navigation

Google apps
AI overview is ready