CREOL, The College of Optics & Photonics, University of Central Florida, Exercises OSE4830: Imaging & Display,...

Transcribed Image Text:

CREOL, The College of Optics & Photonics, University of Central Florida, Exercises OSE4830: Imaging & Display, B. Saleh Exercise 7-1 a) Light from a laser at wavelength = 500 nm illuminates a transparency with transmittance 1+ cos (2ay), where a = 200 lines/mm. The transmitted light is observed in the focal plane of a lens of focal length f = 10 cm, as shown below. Sketch the effect of transparency and the lens on the transmitted light, and show the distribution of the image. Provide numerical values for pertinent angles and positions. y f N -20 mm y 20 mm -20 mm 7 -x 20 mm b) Repeat part a) if white light covering a spectrum from = 500 nm to 750 nm illuminates the same system. Indicate where the different colors go. y 20 mm f -20 mm 1-20 mm x+ 20 mm Exercise 7-2 Axial and Transverse Resolution of Various Scanning Systems Determine the axial and transverse resolution of the following systems: a) An ultrasonic imaging system using 2 us pulses at a frequency of 5 MHz in a medium with sound velocity of 1.5 km/s. The transducer diameter is 3 mm and the beam is focused on a target at a distance of 6 cm. b) A radar imaging system using 10 ns pulses of frequency 3 GHz and a 1-m diameter antenna The target distance is 10 km. c) A laser scanning system using 1 ps pulses at a wavelength of 800 nm focused by a lens of numerical aperture NA = 0.5. The target is inside a medium with refractive index n = 1.3. CREOL, The College of Optics & Photonics, University of Central Florida, Exercises OSE4830: Imaging & Display, B. Saleh Exercise 7-1 a) Light from a laser at wavelength = 500 nm illuminates a transparency with transmittance 1+ cos (2ay), where a = 200 lines/mm. The transmitted light is observed in the focal plane of a lens of focal length f = 10 cm, as shown below. Sketch the effect of transparency and the lens on the transmitted light, and show the distribution of the image. Provide numerical values for pertinent angles and positions. y f N -20 mm y 20 mm -20 mm 7 -x 20 mm b) Repeat part a) if white light covering a spectrum from = 500 nm to 750 nm illuminates the same system. Indicate where the different colors go. y 20 mm f -20 mm 1-20 mm x+ 20 mm Exercise 7-2 Axial and Transverse Resolution of Various Scanning Systems Determine the axial and transverse resolution of the following systems: a) An ultrasonic imaging system using 2 us pulses at a frequency of 5 MHz in a medium with sound velocity of 1.5 km/s. The transducer diameter is 3 mm and the beam is focused on a target at a distance of 6 cm. b) A radar imaging system using 10 ns pulses of frequency 3 GHz and a 1-m diameter antenna The target distance is 10 km. c) A laser scanning system using 1 ps pulses at a wavelength of 800 nm focused by a lens of numerical aperture NA = 0.5. The target is inside a medium with refractive index n = 1.3.