Calcium Fluoride CaF2 transmission

Del Mar Photonics

Del Mar Photonics supply infrared optics from other materials including ZnSe, Germanium, Barium Fluoride, Calcium Fluoride IR grade and many others. E-mail us for custom quote or check our online store for items available in stock.

To request custom quote for precision optical component please e-mail us detailed specifications and drawings or check our online store for standard components available in stock:

Calcium Fluoride - CaF2

Model	Product Name+	Buy Now
BAP-CaF2-15_10	CaF2 brewster angle prism, 15 mm x 10 mm
W-CaF2-12.5-12.5-0.5	CaF2 IR grade window, 12.5x12.5x0.5 mm
W-CaF2-200-5	CaF2 IR grade window, 200x5 mm
VP-CaF-45-3-2 3/4	CaF2 viewport, 2-3/4
W-CaF2-IR-25.4-3	CaF2 window IR grade, ø 25.4 mm x 3.0 mm
W-CaF2-UV-25.4-3	CaF2 window UV grade, ø 25.4 mm x 3.0 mm
W-CaF2-40-7	CaF2 window, ø 40 mm x 7.0 mm
W-CaF2-50.8-3	CaF2 window, ø 50.8 mm x 3.0 mm
DSP-CaF2-15	Dispersion prism, IR grade CaF2, 15x15x15x10 mm

Calcium Fluoride (CaF₂) VUV and IR grade.

Calcium Fluoride (VUV grade) has transmission range 0.19µm to 7.2µm. The refractive index varies from about 1.35 to 1.51 through this range. IR grade Calcium Fluoride is transparent up to 12µm. Degradation due to moisture in the atmosphere is minimal, and polished surfaces may be expected to withstand several years exposure to normal atmospheric conditions. Due to its low refractive index, Calcium Fluoride can be used without an anti - reflective coating. Low solubility and wide transmission makes this material useful for many applications, including mirror substrates for UV laser systems, windows, lenses and prisms for UV and IR applications.

The maximum temperature CaF₂ can tolerate it is 800⁰ C in dry atmosphere. Irradiation of Calcium Fluoride causes some loss in UV transmission. The material is sensitive to thermal shock.

Physical Properties

Crystal type	cubic
Lattice constant	a = 5.462Å
Density	3.18g/cm³
Melting point	1418 °C
Refractive index	n = 1.50 @ 0.2 mm
Thermal expansion coefficient	18.85*10^-6/°C (20°C - 60°C)
Transmission band	0.19 - 7.2 mm (VUV Grade)

CaF₂ windows

Material	optical quality CaF₂ (Dn/cm < 0.5*10^-5)
Surface Quality	40 - 20 scratch & dig
Clear aperture	90% of diameter
Diameter tolerance	+0.0, -0.1 mm
Thickness tolerance	±0.2 mm
Flatness	l/10 @ 633 nm
Parallelism	3 arcmin

Calcium Fluoride Transmission

Calcium Fluoride Refractive Index vs. Wavelength

λ(µm)	n	λ(µm)	n	λ(µm)	n
0.19	1.51	0.33	1.45	5.80	1.39
0.20	1.50	0.41	1.44	6.20	1.38
0.21	1.49	0.88	1.43	6.70	1.37
0.22	1.48	2.65	1.42	7.00	1.36
0.25	1.47	3.90	1.41	7.50	1.35
0.27	1.46	5.00	1.40	8.22	1.34

Germanium optics - Ge

Model	Product Name+	Buy Now
CPPE-Ge-38.1-4	Germanium circular plane parallel etalon, ø 38.1 mm x 4 mm
E-Ge-12.7-25.4	Germanium etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")
RAP-Ge-1	Germanium right angle prism, 25.4x25.4x25.4 mm
W-Ge-114.3-5-AR	Germanium window, ø 114.3 mm x 5.0 mm, AR coated 8-12 micron
W-Ge-125-6	Germanium window, ø 125 mm x 6 mm
W-Ge-125-6-8-12	Germanium window, ø 125 mm x 6 mm, coating AR/DCL 8-12 µm
W-Ge-25.4-3	Germanium window, ø 25.4 mm x 3 mm
W-Ge-38.1-4	Germanium window, ø 38.1 mm x 4 mm
W-Ge-38.1-4	Germanium window, ø 38.1 mm x 4 mm, coated
W-Ge-50.8-3	Germanium window, ø 50.8 mm x 3 mm
W-Ge-50.8-3	Germanium window, ø 50.8 mm x 3 mm
W-Ge-50.8-5	Germanium window, ø 50.8 mm x 5 mm
W-Ge-60-3-CTS	Germanium window, ø 60 mm x 3 mm

Zinc Selenide - ZnSe

Zinc Selenide - ZnSe

Model	Product Name+	Buy Now
PH-ZnSe-40-30-20	ZnSe hemicylindrical prism, 20 mm
PH-ZnSe-25.4-12.7	ZnSe hemicylindrical prism, 25.4 mm
R-ZnSe-25.4-25.4	ZnSe rhomb, 25.4x25.4 mm
RAP-ZnSe-12.7-25.4	ZnSe right angle prism, 12.7 x 25.4 mm
RAP-ZnSe-40-30-20	ZnSe right angle prism, 40x30x20 mm
S-ZnSe-10-10-0.5	ZnSe slide, 10x10x0.5 mm
WS-ZnSe-100-100-10	ZnSe square window, 100x100x10, coated
TR-ZnSe-52-30-20	ZnSe trapezoid, 52x30x20 mm
VP-ZnSe-45-3-2 3/4	ZnSe viewport, 2-3/4
VP-ZnSe-73-4-4 1/2	ZnSe viewport, 4 1/2
W-ZnSe-1.5"-2.5"-1/4	ZnSe window, 38.1x63x6.35 mm, coated
W-ZnSe-105-6-AR	ZnSe window, ø 105 mm, thickness 6 mm, coated
W-ZnSe-12.7-1	ZnSe window, ø 12.7 mm, thickness 1 mm
W-ZnSe-20-3	ZnSe window, ø 20, thickness 3 mm
W-ZnSe-25-2-AR	ZnSe window, ø 25, thickness 2 mm, coated
W-ZnSe-25.4-2-AR-3-1	ZnSe window, ø 25.4 mm, thickness 2 mm, AR coated 3-12 µm
W-ZnSe-25.4-3	ZnSe window, ø 25.4 mm, thickness 3 mm
W-ZnSe-60-3-K	ZnSe window, ø 60 mm, thickness 3 mm, coated
W-ZnSe-76.2-3-K	ZnSe window, ø 76.2 mm, thickness 3 mm, coated

Barium Fluoride - BaF2

Model	Product Name+	Buy Now
WG-BaF2-25.4-10-1.55	BaF2 wedge, 25.4 mm x 10.0 mm x 1.55 mm
WG-BaF2-25.4-10-2.1	BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm
W-BaF2-12.7-2	BaF2 window, ø 12.7 mm x 2.0 mm
W-BaF2-4-0.5	BaF2 window, ø 4" x 0.5", polished, uncoated

Del Mar Photonics featured optical components

Del Mar Photonics continuously expands its optical components portfolio. Browse our online store, read monthly notes about our featured optical products or just send us your requirements or product ideas.

Axicon Lens
Axicon lens also known as conical lens or rotationally symmetric prism is widely used in different scientific research and application. Axicon can be used to convert a parallel laser beam into a ring, to create a non diffractive Bessel beam or to focus a parallel beam into long focus depth.
Del Mar Photonics supplies axicons with cone angles range from 130° to 179.5° for use with virtually any laser radiation. We manufacture and supply axicons made from BK7 glass, fused silica and other materials.
buy online - download brochure

Del Mar Photonics offers optical elements made of high quality synthetically grown Rutile Titanium Dioxide crystals.

Rutile (TiO2) coupling prisms
Del Mar Photonics offers optical elements made of high quality synthetically grown Rutile Titanium Dioxide crystals. Rutile’s strong birefringency, wide transmission range and good mechanical properties make it suitable for fabrication of polarizing cubes, prisms and optical isolators. Boules having high optical transmission and homogeneity are grown by proprietary method. Typical boules have 10 - 15 mm in dia. and up to 25 mm length. Optical elements sizes - from 2 x 2 x 1 mm to 12.7 x 12.7 x 12.7 mm. Laser grade polish quality is available for finished elements. So far we the largest elements that we manufactured are 12 x15 x 5 mm, in which optical axis is parallel to 15 mm edge, 5 mm is along beam path, 12 x 15 mm faces polished 20/10 S/D, one wave flatness, parallelism < 3 arc.min. (better specs. available on request).
more details - buy online - download brochure

Vacuum viewport
Del Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance. Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control. Windows Materials include: Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, Pyrex. Standard Viewing diameters from .55" to 1.94 ".
Coating - a range of custom coatings can applied - which include
- Single QWOT
- Broad Band AR
- V coatings
- ITO
- DLC (Diamond like coating)
more details - request a quote

Manufacturing challenging optical components
Our group works to characterize the interaction of biomolecules with solid surfaces, writes Dennis Hore of University of Victoria, Canada. Nature designs proteins with well-defined structures in solution. The conformation of these molecules may serve a structural purpose, or a chemical one in the case of enzymes. In order to further the progress of technologies that immobilize such molecules on synthetic surfaces (like biosensors employing enzymes), it is important to have a detailed understanding and control of the interactions of these molecules with the surface more
For that project Del Mar has been able to manufacture all shapes of prisms from CaF2, fused silica, and ZnSe according to our custom specifications.

Del Mar Photonics online store features windows, prisms, lenses, attenuators, etalons, crystals and wafers, and other items. Axicons, barium fluoride windows, germanium etalons, rutile (TiO2) prisms, microchannel plates and detectors, saturable absorber mirrors, photoconductive THz antennas, lithium niobate wafers and crystals and many other high quality affordable components for scientific research and OEM production are delivered globally from stock.
Micro Prism from Del Mar Photonics

We are looking forward to hear from you and help you with your optical and crystal components requirements. Need time to think about it? Drop us a line and we'll send you beautiful Del Mar Photonics mug (or two) so you can have a tea party with your colleagues and discuss your potential needs

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