Franswa Abraham

7 Questions 4 Answers 0 Followers

Questions related from Franswa Abraham

How to calculate the rise in surface temperature in response to heat pulsation?

A laser source is used to heat the top layer of a 316 L test specimen. Can we use the following equation to calculate the surface temperature response? T (t) = T0 + Q / [e. ( π .t)^1/2] where Q (...

07 March 2020 8,515 2 View

How to calculate the temperature change while using LED array to heat a sample (316L) ?

An LED array of optical power output of 10mW/cm^2 is used to supply heat to a 316L sample (room temparature) having dimension 10*10*5 (mm).The LED is flashed for a duration of 1 second. How to...

04 March 2020 2,698 1 View

How to calculate the energy input from a flash lamp?

Flash lamp is used in this case to heat up a rectangular plate to detect defect using active thermography. How to calculate the energy input per unit area, if a flash lamp of Energy density 40...

26 February 2020 4,196 5 View

How to overcome superimposing of thermal waves generated at the surface and thermal waves reflected from internal defect in Lock in Thermography?

Halogen lamp is used as an excitation source. Due to the superimposing of the thermal waves, the temperature difference measurement is not accurate.

21 February 2020 5,852 2 View

How to calculate the energy density of a cw laser on a scan head with a scan speed of 800 mm/s?

Does the scan speed has an effect on energy density? When the CW laser is focused to a point, the energy density is calculated by dividing Pulse energy by area of the beam spot. But if the laser...

20 February 2020 6,191 5 View

Does modulation frequency has an effect on output power of cw/modulated laser?

Laser specs: Yb Laser Wavelength=1070 nm Mode of operation : cw/modulated Maximum average power=400 W Modulation frequency= 0-50 kHz

20 February 2020 8,609 3 View

How can i find the beam diameter at a distance x from the focus point? Can I use the below attached equation for that?

Can I use the below attached equation for that by substituting waist radius w0 by the radius of focused laser beam? Aim of my project is the analysis of a Laser boring machine(LASAG KLS 246)...

01 June 2019 3,175 5 View