Del Mar Photonics

Germanium window, ø 25.4 mm x 3.0 mm

Ge optical grade
Type: circular plane window
Diameter: 25.4 mm (+0.0/-0.2 mm)
Thickness: 3 mm (+/-0.1 mm)
Surface quality: 40/20 scr/dig
Parallelism: 3 arc minutes
Clear aperture: 90% of diameter

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New: meniscus lenses made of AMTIR-C1 and Germanium substrates with AR/AR coating at 3-5 and 8-12 microns.

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.

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  Buy Now 
 E-Ge-1.25-3   Germanium etalon, ø 1.25" x 3"  Buy Now 
 E-Ge-12.7-25.4   Germanium etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")  Buy Now 
 RAP-Ge-1   Germanium right angle prism, 25.4x25.4x25.4 mm  Buy Now 
 W-Ge-114.3-5-AR   Germanium window, ø 114.3 mm x 5.0 mm, AR coated 8-12 micron  Buy Now 
 W-Ge-125-6   Germanium window, ø 125 mm x 6 mm  Buy Now 
 W-Ge-125-6-8-12   Germanium window, ø 125 mm x 6 mm, coating AR/DCL 8-12 Ám  Buy Now 
 W-Ge-25.4-3   Germanium window, ø 25.4 mm x 3 mm  Buy Now 
 W-Ge-38.1-4   Germanium window, ø 38.1 mm x 4 mm  Buy Now 
 W-Ge-38.1-4-10.6   Germanium window, ø 38.1 mm x 4 mm, coated 10.6 Ám  Buy Now 
 W-Ge-50.8-3   Germanium window, ø 50.8 mm x 3 mm  Buy Now 
 W-Ge-50.8-3   Germanium window, ø 50.8 mm x 3 mm  Buy Now 
 W-Ge-50.8-5   Germanium window, ø 50.8 mm x 5 mm  Buy Now 
 W-Ge-60-3-CTS   Germanium window, ø 60 mm x 3 mm  Buy Now 

 

Calcium Fluoride - CaF2
 
 
 Model   Product Name+   Buy Now 
 BAP-CaF2-15_10   CaF2 brewster angle prism, 15 mm x 10 mm  Buy Now 
 W-CaF2-12.5-12.5-0.5   CaF2 IR grade window, 12.5x12.5x0.5 mm  Buy Now 
 W-CaF2-200-5   CaF2 IR grade window, 200x5 mm  Buy Now 
 VP-CaF-45-3-2 3/4   CaF2 viewport, 2-3/4  Buy Now 
 W-CaF2-IR-25.4-3   CaF2 window IR grade, ø 25.4 mm x 3.0 mm  Buy Now 
 W-CaF2-UV-25.4-3   CaF2 window UV grade, ø 25.4 mm x 3.0 mm  Buy Now 
 W-CaF2-40-7   CaF2 window, ø 40 mm x 7.0 mm  Buy Now 
 W-CaF2-50.8-3   CaF2 window, ø 50.8 mm x 3.0 mm  Buy Now 
 DSP-CaF2-15   Dispersion prism, IR grade CaF2, 15x15x15x10 mm  Buy Now 
 PCC-CaF2-12.7-25   IR Calcium Fluoride Plano-Concave Lens, ø 0.5", f = -25 mm  Buy Now 
 PCX-CaF2-12.7-25   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 25 mm  Buy Now 
 PCX-CaF2-12.7-50   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 50 mm  Buy Now 
 PCX-CaF2-12.7-75   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 75 mm  Buy Now 
 PCX-CaF2-12.7-100   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 100 mm  Buy Now 
 PCX-CaF2-12.7-150   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 150 mm  Buy Now 
 PCX-CaF2-12.7-200   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 200 mm  Buy Now 
 PCX-CaF2-12.7-250   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 250 mm  Buy Now 
 PCX-CaF2-12.7-300   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 300 mm  Buy Now 
 PCX-CaF2-12.7-400   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 400 mm  Buy Now 
 PCX-CaF2-12.7-500   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 500 mm  Buy Now 
 PCX-CaF2-12.7-750   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 750 mm  Buy Now 
 PCX-CaF2-12.7-1000   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 1000 mm  Buy Now 
 PCX-CaF2-12.7-2000   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 2000 mm  Buy Now 
 PCX-CaF2-25.4-50   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 50 mm  Buy Now 
 PCX-CaF2-25.4-75   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 75 mm  Buy Now 
 PCX-CaF2-25.4-150   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 150 mm  Buy Now 
 PCX-CaF2-25.4-200   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 200 mm  Buy Now 
 PCX-CaF2-25.4-250   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 250 mm  Buy Now 
 PCX-CaF2-25.4-300   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 300 mm  Buy Now 
 PCX-CaF2-25.4-400   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 400 mm  Buy Now 
 PCX-CaF2-25.4-500   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 500 mm  Buy Now 
 PCX-CaF2-25.4-750   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 750 mm  Buy Now 
 PCX-CaF2-25.4-1000   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 1000 mm  Buy Now 
 PCX-CaF2-25.4-2000   IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 2000 mm  Buy Now 

 

Zinc Selenide - ZnSe
 
Zinc Selenide - ZnSe
 Model   Product Name+   Buy Now 
 PH-ZnSe-40-30-20   ZnSe hemicylindrical prism, 20 mm  Buy Now 
 PH-ZnSe-25.4-12.7   ZnSe hemicylindrical prism, 25.4 mm  Buy Now 
 R-ZnSe-25.4-25.4   ZnSe rhomb, 25.4x25.4 mm  Buy Now 
 RAP-ZnSe-12.7-25.4   ZnSe right angle prism, 12.7 x 25.4 mm  Buy Now 
 RAP-ZnSe-40-30-20   ZnSe right angle prism, 40x30x20 mm  Buy Now 
 S-ZnSe-10-10-0.5   ZnSe slide, 10x10x0.5 mm  Buy Now 
 WS-ZnSe-100-100-10   ZnSe square window, 100x100x10, coated  Buy Now 
 TR-ZnSe-52-30-20   ZnSe trapezoid, 52x30x20 mm  Buy Now 
 VP-ZnSe-45-3-2 3/4   ZnSe viewport, 2-3/4  Buy Now 
 VP-ZnSe-73-4-4 1/2   ZnSe viewport, 4 1/2  Buy Now 
 VP-ZnSe-32-3.5-2 3/4   ZnSe viewport, dia. 32 mm, thickness 3.5 mm, flange 2-3/4  Buy Now 
 W-ZnSe-1.5"-2.5"-1/4   ZnSe window, 38.1x63x6.35 mm, coated  Buy Now 
 W-ZnSe-105-6-AR   ZnSe window, ø 105 mm, thickness 6 mm, coated  Buy Now 
 W-ZnSe-12.7-1   ZnSe window, ø 12.7 mm, thickness 1 mm  Buy Now 
 W-ZnSe-20-3   ZnSe window, ø 20, thickness 3 mm  Buy Now 
 W-ZnSe-25-2-AR   ZnSe window, ø 25, thickness 2 mm, coated  Buy Now 
 W-ZnSe-25.4-2-AR-3-1   ZnSe window, ø 25.4 mm, thickness 2 mm, AR coated 3-12 Ám  Buy Now 
 W-ZnSe-25.4-3   ZnSe window, ø 25.4 mm, thickness 3 mm  Buy Now 
 W-ZnSe-60-3-K   ZnSe window, ø 60 mm, thickness 3 mm, coated  Buy Now 
 W-ZnSe-76.2-3-K   ZnSe window, ø 76.2 mm, thickness 3 mm, coated  Buy Now 

 

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  Buy Now 
 WG-BaF2-25.4-10-2.1   BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm  Buy Now 
 W-BaF2-12.7-2   BaF2 window, ø 12.7 mm x 2.0 mm  Buy Now 
 W-BaF2-4-0.5   BaF2 window, ø 4" x 0.5", polished, uncoated  Buy Now 
 PCX-BaF2-25.4-25   IR Barium Fluoride Plano-Convex Lens, ø 1", f = 25 mm  Buy Now 
 PCX-BaF2-25.4-50   IR Barium Fluoride Plano-Convex Lens, ø 1", f = 50 mm  Buy Now 
 PCX-BaF2-25.4-75   IR Barium Fluoride Plano-Convex Lens, ø 1", f = 75 mm  Buy Now 
 PCX-BaF2-25.4-100   IR Barium Fluoride Plano-Convex Lens, ø 1", f = 100 mm  Buy Now 
 PCX-BaF2-25.4-200   IR Barium Fluoride Plano-Convex Lens, ø 1", f = 200 mm  Buy Now 
 PCX-BaF2-50.8-100   IR Barium Fluoride Plano-Convex Lens, ø 2", f = 100 mm  Buy Now 
 PCX-BaF2-50.8-200   IR Barium Fluoride Plano-Convex Lens, ø 2", f = 200 mm  Buy Now

 

Germanium windows and their applications

Germanium Windows
Germanium is popular for its high index of refraction (around 4.0 from 2-14Ám
Germanium Windows for Thermography
The transmission of BBAR-coated germanium window.
Transmission spectrum of a Ge window
Thermal Runaway in Germanium Laser Windows
Lenses made out of germanium focus infrared light
Thermal imaging cover window, germanium cover windows, DLC coated ...
Our Thermal imaging Germanium cover windows are available with Anti reflection coatings on both sides, or with Hard Carbon Diamond coatings. ...
www.galvoptics.fsnet.co.uk/thermal_ge_windows.htm - 37k - Cached - Similar pages
Germanium lenses Infrared filters and window optics
Infrared Filters & Metalized Windows. Windows. Germanium Sapphire Zinc Sulfide Silicon Zinc Selenide. Filters.
Germanium Stock Windows
Germanium windows are available ex-stock
Germanium Window (Ge Window) widely used in IR sensors, thermal image, medical and other applications.
Germanium Window
Germanium optics for pyrometry and thermography
BBAR coated Germanium windows for pyrometry and thermography.
Germanium FLIR optics ...
carbon hardened germanium window
germanium window, lenses
Germanium(Ge) Windows/Lenses Germanium is a commonly used infrared window material. It's popular for its high index of refraction and good IR transmission.
Battlefield-Ready Infrared Windows for Night Vision/Heat Detection ...
DLC multilayer coating
thermal infrared imaging flir camera
Diamond coated hardened carbon Germanium window.
A window fabricated from germanium is both electrically and thermally conductive.

Del Mar Photonics

Quantum Cascade Lasers Calibration

Customer wrote:
My application is calibrate the relative wavelength of tunable quantum cascade lasers in the mid-infrared (~10 microns). The laser itself is used for remote sensing of atmospheric gases.

FSR (Free Spectral Range)  is determined by etalon length L and wavelength of operation λ

FSR= (λ2) / (2*n*L)

The most popular standard etalon is 1 inch long
For longer wavelength (> 10 micron) it's often necessary to use etalons 2-3 inches long to get required accuracy of calibration.

Del Mar Photonics offer variety of standard as well as custom germanium etalons.

 

Here are few examples of Ge etalon specifications:

Ge etalon part number #GEFPE1/0.5 request a quote - sold in Greyhawk Optics nline store as part number E-Ge-12.7-25.4
Length 1.00 +/- 0.01 inch
Diameter 0.50 +/- 0.05 inch
1/4 lambda flat each end, HeNe
parallel to 3 ARC SEC or better
length measure to 0.0005"
small bevels
surface quality F-f(80/50) per MIL-F-48616


Ge etalon part number #GEFPE3/1.25 - request a quote
Length 3.00 +/- 0.01 inch
Diameter 1.25+/- 0.05 inch
Other specification as in #GEFPE1/05
Ge etalon part number #GEFPE20mm/1.5


Ge etalon part number #GEFPE20mm/1.5 - request a quote
dia 38.1 (-0.1) mm
thickness: 20 (+/-0.1) mm
Flatness: 1 fringe ( Lambda/2 at 633 nm) , delta N = 0.2 fringes
Surface quality: 60-40 s/d
Parallelism: < 2 sec
Perpendicularity: 5 min

 

 Model   Product Name+   Buy Now 
 CPPE-Ge-38.1-4   Germanium circular plane parallel etalon, ø 38.1 mm x 4 mm  Buy Now 
 E-Ge-12.7-25.4   Germanium etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")  Buy Now 


 

Using Ge etalon in gas sensing project involving quantum cascade lasers


Jagadeeshwari (Esha) Manne, PhD student, University of Alberta

Project: Infrared absorption spectroscopy with Quantum cascade laser.

The advance of Quantum cascade (QC) lasers fabricated by band structure engineering offers an attractive new option for IR absorption spectroscopy. QC-DFB lasers are of particular interest to gas-sensing applications because they emit single frequency radiation which falls within the 3-15 um window, where the fundamental absorption bands of most of the molecules are located.

Research Activities:

  • QC laser characterization
  • Exploring different strategies for trace gas detection and comparing the detection limits and sensitivity for open-path measurements.

 

I am a graduate student pursuing my doctoral studies at the University of Alberta. The Ge- etalon will be used for non-profit research here at the university. I am presently working on a gas sensing project involving Quantum cascade laser.

The mid-IR region is ideally suited for absorption spectroscopy since the fundamental vibrational transitions of a number of molecules lie here. Quantum cascade (QC) lasers  fabricated by band structure engineering offer an attractive new option for sensitive IR absorption spectroscopy. Distributed feed-back pulsed QC lasers are of particular interest for they allow the realization of a room temperature, compact IR source with relatively high output power. In particular, their combination with the pulsed-CRDS technique has the potential for high sensitivity trace gas analysis. The goal of our present work is to develop a technique for quantitative online analysis of trace constituents in exhaled breath.  We are using pulsed-CRDS technique in combination with a mid IR QC laser operating near 970 cm-1 to measure ammonia levels in exhaled breath. An unlocked ring-down cavity was designed for these studies which can be operated at atmospheric or reduced pressure. We have already attained a detection limit of 25 ppb for ammonia. We are in a process of improving the system to get down to sub ppb levels with this technique.

The etalon will be used for characterization of the laser which would be an important step in choosing the right parameters for the laser for gas-sensing applications.

Del Mar Photonics

Del Mar Photonics featured components

Del Mar Photonics continuously expands its components portfolio.


 
Solar Prisms for Concentrating Photovoltaic Systems (CPV)
Solar cells made of compound semiconductors such as gallium arsenide are very expensive. Usually very small cells are installed and various means such as mirrors, lenses, prisms, etc..are used  to concentrate sunlight on the cells. Concentration photovoltaic technology (CPV) uses the solar radiation with an efficiency of 40%, double that of conventional solar cells
Del Mar Photonics design custom Concentrating Photovoltaic Systems (CPV) and supply variety of the optical components for CPV such as solar prisms shown in the picture.
 

hexagonal light pipes, optical rods


 
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.

download brochure -
request a quote
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. Rutileĺs 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 - download brochure -
request a quote

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

 

 

Hydrogen Thyratrons are used in such devices as radars with different power levels, high-power pulsed technical, electrophysical, medical devices and lasers. Sophisticated design and high quality ceramic-metal envelope determines long lifetime and very accurate and reliable operation of hydrogen thyratrons under wide range of environmental conditions.
Applications:
- radars
- pulsed  lasers power supplies
- medical apparatus
- electrophysical instrumentation

Triggered Three-Electrode Spark Gap Switches are ceramic-metal sealed off gas discharge trigatron-type devices with a co-axial trigger electrode. These Gas Discharge Tubes contain no mercury and, due to an advanced design, feature high reliability and a long lifetime being operating under wide range of environmental conditions.

Applications:
- pulsed installation for processing materials
- installations with plasma focus
- pulse power supplies for lasers and other pulse equipment
- medical apparatus such as lithotriptors and defibrillators
- processing systems for petroleum wells
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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Del Mar Photonics, Inc.
4119 Twilight Ridge
San Diego, CA 92130
tel: (858) 876-3133
fax: (858) 630-2376
Skype: delmarphotonics
sales@dmphotonics.com