Development and Characterization of a 300mm Dual
... The primary concept decisions concentrated on illumination wavelength, illumination source type, image sensor type, and optical design. A shorter illumination wavelength allows higher optical resolution, but the wavelength must be long enough to transmit efficiently through silicon. The illumination ...
... The primary concept decisions concentrated on illumination wavelength, illumination source type, image sensor type, and optical design. A shorter illumination wavelength allows higher optical resolution, but the wavelength must be long enough to transmit efficiently through silicon. The illumination ...
Measuring the Modulation Transfer Function of
... grill(bar/square) pattern. Slanted-edge target is a square target contains four slanted edges which are contrast edges compared with the background. The method to measure the MTF by slanted-edge target is called slantededge method or slanted-edge analysis.1 This is the least computational method for ...
... grill(bar/square) pattern. Slanted-edge target is a square target contains four slanted edges which are contrast edges compared with the background. The method to measure the MTF by slanted-edge target is called slantededge method or slanted-edge analysis.1 This is the least computational method for ...
Real-Time Multicolor DNA Detection with Chemoresponsive
... Equations 2 and 3 further imply that the changes in diffraction efficiency, due to absorptivity effects, will be wavelength dependent. Notably, the changes in diffraction efficiency brought by absorptivity effects can be the same sign as simple realcomponent effects or opposite in sign. Additionally ...
... Equations 2 and 3 further imply that the changes in diffraction efficiency, due to absorptivity effects, will be wavelength dependent. Notably, the changes in diffraction efficiency brought by absorptivity effects can be the same sign as simple realcomponent effects or opposite in sign. Additionally ...
THE USE OF INFRARED RADIATION FOR THERMAL
... use silicon detectors with response out to approximately 1.1µm. These nearinfrared sensors can exploit the high reflectivity of live foliage and the low reflectivity of conventional paints to see a large negative contrast difference between the vehicle and its background. FLIRs and imaging seekers n ...
... use silicon detectors with response out to approximately 1.1µm. These nearinfrared sensors can exploit the high reflectivity of live foliage and the low reflectivity of conventional paints to see a large negative contrast difference between the vehicle and its background. FLIRs and imaging seekers n ...
AR4000
... in different ways. They are described below, but each has a range of sample rates at which it is the predominant source of noise. Figure 1 shows the accuracy limit imposed by each type of noise for a given sample rate. The first type is detector thermal noise, which originates in the signal detectio ...
... in different ways. They are described below, but each has a range of sample rates at which it is the predominant source of noise. Figure 1 shows the accuracy limit imposed by each type of noise for a given sample rate. The first type is detector thermal noise, which originates in the signal detectio ...
Introduction to Target Detection
... Imaging systems produce an image of the target, that is, a two-dimensional (2D) representation in some feature space of a three-dimensional (3D) object. For instance, a color photograph is a 2D representation of an object using color as a feature. A thermal image is a 2D representation of an object ...
... Imaging systems produce an image of the target, that is, a two-dimensional (2D) representation in some feature space of a three-dimensional (3D) object. For instance, a color photograph is a 2D representation of an object using color as a feature. A thermal image is a 2D representation of an object ...
Infrared homing
Infrared homing refers to a passive weapon guidance system which uses the infrared (IR) light emission from a target to track and follow it. Missiles which use infrared seeking are often referred to as ""heat-seekers"", since infrared is radiated strongly by hot bodies. Many objects such as people, vehicle engines and aircraft generate and retain heat, and as such, are especially visible in the infrared wavelengths of light compared to objects in the background.Infrared seekers are passive devices, which, unlike radar, provide no indication that they are tracking a target. This makes them suitable for sneak attacks during visual encounters, or over longer ranges when used with a forward looking infrared system or similar cuing system. This makes heat-seekers extremely deadly; 90% of all United States air combat losses over the past 25 years have been due to infrared-homing missiles. They are, however, subject to a number of simple countermeasures, most notably dropping flares behind the target to provide false heat sources. This only works if the pilot is aware of the missile, and modern seekers have rendered these increasingly ineffective even in that case.The first IR devices were experimented with in the pre-WWII era. During the war, German engineers were working on heat seeking missiles and proximity fuses, but did not have time to complete development before the war ended. Truly practical designs did not become possible until the introduction of conical scanning and miniaturized vacuum tubes during the war. Anti-aircraft IR systems began in earnest in the late 1940s, but both the electronics and entire field of rocketry was so new that it required considerable development before the first examples entered service in the mid-1950s. These early examples had significant limitations and achieved very low success rates in combat during the 1960s. A new generation developed in the 1970s and 80s made great strides and significantly improved their lethality. The latest examples from the 1990s and on have the ability to attack targets out of their field of view (FOV), behind them, and even pick out vehicles on the ground.The infrared sensor package on the tip or head of a heat-seeking missile is known as the seeker head. The NATO brevity code for an air-to-air infrared-guided missile launch is Fox Two.