Optics for Sensors and Detectors
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Sensors as well as varios systems on their base are widly used and discover new and new areas for applciations on almost all aspects of human activity. Optical IR-sensors and detectors belong to a special niche since are allowed to control and manage the processes which take place at room and much low temperatures. Majority of the devices here are remote-acting and non-contact.
Application of Wien's law to human body emission results in a peak wavelength of
For this reason, thermal imaging devices for human subjects are most sensitive in the 7‑14um range.
For monitoring and temperature measurements of higher heated environments the wavelength range 3-5um is used.
Practically all organic and inorganic compounds have the unique feature that they more or less good absorb at the diapason of 2‑15um. This cause the wide products line of IR-sensors and IR-detectors.
Tydex introduces various passive optics for the discussed topic.
Hereunder are some examples of the optical elements demonstrating the range of our products. Additional information is available in the following chapter - Frontal optics for ultimate applications.
1) Silicon meniscus lenses for 3-5 um IR detectors (pyrometers)
Application: production of concrete, steel, glasses, etc.
Specification:
Material Si Type meniscus lens, plano-convex lens Diameter, mm 29 (+0/-0.2) Central thickness, mm 4 (+/-0.2) EFL tolerance, % +/-2 Surface quality, scr/dig 60/40 Surface figure, fringes N<=5, deltaN<=1 @633nm AR coating (BBAR/BBAR type), <1 (see the curve below) |  |
2) Germanium windows for 8-12 um IR imager
Application: to be installed at helicopter for long-distanse monitoring of forest fire
Specification:
Material Ge Type plano-plano window Diameter, mm 120 (+0/-0.2) Thickness, mm 4 (+/-0.2) Surface quality, scr/dig 60/40 Surface figure, fringes N<=5, delta N<=1 @633nm AR coating (DLC/BBAR type), <5 (see the curve below) |  |
3) Germanium meniscus lenses for 8-10 um IR imager
Application: sea-based system of 360 deg.-panoramic view
Specification:
Material Ge Type meniscus lens Diameter, mm 105 (+0/-0.2) Central thickness, mm 8 (+/-0.2) EFL tolerance, % +/-2 Surface quality, scr/dig 60/40 Surface figure, fringes N<=5, delta N<=1 @633nm AR coating (DLC/BBAR type), <5 (see the curve below) |  |
4) Protective domes for pyranometers
Application: meteorology, climatology, environmental monitoring at green-houses and open fields
Specification:
Material Glass, quarts Type dome Diameter, mm 32 (+0/-0.2) Central thickness, mm 3.7 (+/-0.2) Surface quality, scr/dig 80/50 |  |
5) Filter for pyrgeometers
Application: measuring an effective atmospheric IR radiation spectrum over wide spectral range (4.5-45 um)
Specification:
Material FZ-Si Type plano-plano window, meniscus lens Diameter, mm 31.8 (+0/-0.2) Thickness, mm 1 (+/-0.1) Surface quality, scr/dig 40/20 AR coating (DLC/solar blind type) (see the curve below) |  |
6) Sapphire window for under-water sensors
Application - to be installed at bathyscaphe to monitor continental shelf, ship's bottom, etc
Specification:
Material Sapphire Type plano-plano window Diameter, mm 77 (+0/-0.2) Thickness, mm 6.0 (+/-0.2) Surface quality, scr/dig 60/40 Surface figure, fringes N<=5, delta N<=1 @633nm |  |
7) Si bullet-lens for 3-5 um IR immersion LED's and photodiodes
Application: to be used as lighter emitter
Specification:
Material Si Type bullet-lens Diameter, mm 3.5 (+0/-0.4) Central thickness, mm 3.21 (+/-0.05) Surface quality, scr/dig 40/20 Surface figure, fringes N<=5, AR coating (one side BBAR @3-5 um) (see the curve below) |  |
8) CaF2 bullet-lens for 3-5 um IR immersion LED's and photodiodes
Application: environmental monitoring
Specification:
Material CaF2 Type bi-convex lens Diameter, mm 11 (+0/-0.1) Central thickness, mm 5.3 (+/-0.2) EFL @4.25um, mm 12.5 Surface quality, scr/dig 80/50 Surface figure, fringes N<=2, delta N<=1 @633nm |  |
9) ZnSe lens for 10.6 um laser
Application: laser industry, CO2- and CO-detectors, medicine
Specification:
Material CVD-ZnSe Type plano-convex lens Diameter, mm 12.7 (+0/-0.2) Central thickness, mm 2.0 (+/-0.2) EFL tolerance, % +/-2 Surface quality, scr/dig 40/20 Surface figure, fringes N<=1, AR coating (AR/AR type), R @10.6 um, % <0.5 (see the curve below) |  |
10) ZnSe beamsplitter
Application: monitoring of air quality, nitrogen fixation, fruit storage, mycology, medicine
Specification:
Material CVD-ZnSe Type plano-plano window Diameter, mm 25 (+0/-0.2) Thickness, mm 4 (+/-0.2) Surface quality, scr/dig 40/20 Surface figure, fringes N<=5, delta N<=1 @633nm Coating (see the curve below) -S1: AR @10.3 um -S2: R=90%+/-5% @10.3um |  |
11) ZnSe window for IR detectors, etc.
Application: monitoring of air quality, nitrogen fixation, fruit storage, mycology, medicine.
Specification:
Material CVD-ZnSe Type plano-plano window Diameter, mm 12.7 (+0/-0.2) Thickness, mm 3.0 (+/-0.2) Surface quality, scr/dig 60/40 Surface figure, fringes N<=1, AR coating (AR/AR type), R @ 4.5um, % (see the curve below) |  |
12) Teflon IR polarizer
Application: methane leak detectors
Specification:
Material Teflon Diameter, mm 12.7 (+0/-0.2) Transmission curve See the chapter IR Polarizers |  |
We are pleased to emphasize that the list of similar components is permanently replenished and we are ready to considerate yuor new RFQ's.
