The temperature that can be reached by TE coolers is related to the number of stages being used. Water or air cooling is usually used to dissipate the heat accumulated in this process. TE stages are typically connected side by side and inserted between two insulators. The cold face absorbs heat which is sent to the other side where the heat sink is located. The passage of an electrical current via the junction induces a heat flow from one face to the other, producing a hot and cold side.
#INTRINSIC DARK NOISE SERIES#
Semiconductors with varied electron densities, n-type and p-type (Figure 1), are placed in series and connected with a conducting material on each side. These stages use Peltier effect to produce a temperature difference between the two faces. Thermoelectric (TE) stages are solid-state devices composed of two different faces. Overview of Cooling Methods Thermoelectric Cooling This article presents a short introduction to thermoelectric (TE) cooling along with a comparison with other available cooling methods. With their combined TE4 air-cooled systems, these cameras are capable of reaching an operating temperature of -80 ☌ and have dark currents of 300 e-/p/s s (ZephIR 1.7), 30 Me-p/s (ZephIR 2.5) and 340 Me-/p/s (ZephIR 2.9). The ZepIR 2.5 and 2.9 are HgCdTe cameras sensitive in the 0.85 µm to 2.5 µm and 0.85 µm to 2.9 µm ranges, respectively. The ZephIR 1.7 is an InGaAs camera sensitive in the 800 nm to 1700 nm range. makes use of a four stage thermoelectric (TE4) air-cooled system in order to improve the sensitivity of its imaging sensors. In its new ZephIR line of SWIR cameras, Photon etc. Multiple cooling technologies are available, each having specific drawbacks and benefits. Extremely careful attention must be paid to the cooling method used to optimize these parameters. Dark current is considered to be a critical parameter when one is looking to acquire a scientific imaging camera, specifically in the short-wave infrared (SWIR) region.
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