Calcium Fluoride Plano-Convex Infrared Lenses
Calcium Fluoride Plano-Convex Infrared Lenses
Calcium Fluoride lenses are an excellent choice of material for UV to Near IR wavelengths (180 - 8,000 nm). It has a high average transmission and low chromatic aberration compared to various IR materials. In Near IR regime it has a very low GVD which makes it suitable for applications using femtosecond IR pulses.
- High IR transmission Calcium Fluoride substrates
- Plano-convex for focusing applications
- Uncoated See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | CAPX016 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Infrared Lens, CaF2, 25.4 mm, 500mm EFL, 150-8000nm | Discontinued | ||||
| CAPX10 Calcium Fluoride Plano-Convex IR LensesCalcium Fluoride Plano-Convex Lens, 12.7 mm, 25.4 mm FL, 180-8000 nm | |||||
| CAPX11 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 50 mm FL, 180-8000 nm | |||||
| CAPX12 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 75 mm FL, 180-8000 nm | |||||
| CAPX13 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 100 mm FL, 180-8000 nm | |||||
| CAPX14 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 150 mm FL, 180-8000 nm | |||||
| CAPX15 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 200 mm FL, 180-8000 nm | |||||
| CAPX16 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 250 mm FL, 180-8000 nm | |||||
| CAPX17 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 500 mm FL, 180-8000 nm | |||||
| CAPX18 Calcium Fluoride Plano-Convex IR LensesPlano-Convex Lens, Calcium Fluoride, 25.4 mm, 1000 mm FL, 180-8000 nm | |||||
Features
High IR Transmission Calcium Fluoride Substrate
Calcium Fluoride lenses are an excellent choice of material for UV to Near IR wavelengths (180 - 8,000 nm). It has a high average transmission and low chromatic aberration compared to various IR materials. In Near IR regime it has a very low GVD which makes it suitable for applications using femtosecond IR pulses. For more information, refer to the optical material technical note.
Standardized Plano-Convex Focal Lengths
Standard effective focal lengths across a variety of newport lens sizes, materials and shapes provide a systematic approach allowing for lenses of different sizes to be interchanged without requiring other changes to your optical system. Collimating a point light source coming from the planar surface or focusing a collimated light source which is incident on the curved surface will help to minimize the spherical aberration.
Plano-Convex Lens Shape for Focusing Light
Plano-Convex lenses are the best choice for focusing parallel rays of light to a single point. They can be used to focus, collect and collimate light. The asymmetry of this lens shape minimizes spherical aberration in situations where the object and image are located at unequal distance from the lens. The optimum case is where the object is placed at infinity with parallel rays entering lens and the final image is a focused point.
Focusing a Collimated Laser Beam
For an application example, let’s look at the case of the output from a Newport R-31005 HeNe laser focused to a spot using a KPX043 Plano-Convex Lens. This Hene laser has a beam diameter of 0.63 mm and a divergence of 1.3 mrad. Note that these are beam diameter and full divergence, so in the notation of our figure, y1 = 0.315 mm and θ1 = 0.65 mrad. The KPX043 lens has a focal length of 25.4 mm. Thus, at the focused spot, we have a radius θ1f = 16.5 µm. So, the diameter of the spot will be 33 µm.
Collimating Light from a Point Source
Since a common application is the collimation of the output from an Optical Fiber, let’s use that for our numerical example. The Newport F-MBB fiber has a core diameter of 200 µm and a numerical aperture (NA) of 0.37. The radius y1 of our source is then 100 µm. NA is defined in terms of the half-angle accepted by the fiber, so θ1 = 0.37. If we again use the KPX043 , 25.4 mm focal length lens to collimate the output, we will have a beam with a radius of 9.4 mm and a half-angle divergence of 4 mrad.
Mounted Version - with Lens Tubes
The lenses can be mounted in LT series lens tube for constructing a complex optical system or quickly connecting to other threaded lens mounts: A-Line™ series fixed lens mount, or adjustable lens positioner (with thread adapter). Use LT-WR series spanner wrench for easy lens installation.
