Determine the correction curves, Physics

A thermal imager is used to measure the temperature of a target surface (ε = 1) in the test section of a wind tunnel. The thermal imager must view the target though a window. The temperature of the target varies between 300 and 700 K. We want to be able to determine the target temperature but we know we must correct the camera measurements for the effects of window reflection (ρ = 0.05 - 0.3) of the surrounding room, window transmission, and window emission (i.e. if the target is cold and the window is hot the camera will sense a false high temperature for the target).

The camera has a perfect flat response curve between 3 and 4.5 µm but outside this range it sees nothing. The camera sees the surface through a window made of a material that has a transmissivity of 0.6 - 0.95 in the spectral range of 3-4.5 µm. The window temperature varies between 400 and 800 K. The surroundings are at 300 K. Determine the correction curves that convert the camera indicated target temperature to the true target temperature for the above range of parameters.

Posted Date: 2/21/2013 7:50:37 AM | Location : United States







Related Discussions:- Determine the correction curves, Assignment Help, Ask Question on Determine the correction curves, Get Answer, Expert's Help, Determine the correction curves Discussions

Write discussion on Determine the correction curves
Your posts are moderated
Related Questions
Spin-orbit effect An influence that causes atomic energy levels to be split since electrons have intrinsic angular momentum (spin) additionally to their extrinsic orbital angul

Q. What are Stark and Zeeman effects? It is found that while electric or magnetic field is applied to the atom all of the spectral line split into several lines. The former ef

The Broken Pencil-Ray Optics A general classroom demonstration includes placing a pencil (or similar object) within an upright position within a round glass of water. The penci

Q. Write an expression for interest rate parity under the condition of imperfect asset substitutability. Answer:  R = R* + (E e - E)/E + a where R denotes the risk premium tha

The conductivity of an extrinsic semiconductor (A) Decreases with temperature. (B) Increases with temperature. (C) Remains constant with temperature. (D) Decrea

Mica is an inorganic mineral. It is one of the best natural insulating materials available. In spite of the tremendous progress made in insulation technology this material and its

Chemical changes during: Discharging: The current will flow from positive to negative plate in the external circuit. As current now enters by negative plate, the negative


In a certain binary-star system, each star has the same mass which is 9.4 times of that of the Sun, and they revolve about their center of mass. The distance between them is the 3.

Q. The gain of an amplifier without feedback is 100 and the gain of an amplifier with feedback is 200. Calculate the feedback fraction. Solution : Voltage gain after feedba