What is the focal length of the lens system?
(-5.58)
2. Explain: (a) Minimum Deviation Angle of a prism
(b) Airy Pattern
3. A laser light of 632.8 nm wavelength is diffracted from a grating of 250 lines/mm.
Assume the distance from the grating to the screen is 250 cm, please calculate the
distance between each diffraction spot.
4. In a 4f system: (a) The input image is shown as Fig. 2(A) and the mask is shown as
Fig. 2(B). Please describe the probable output image by sketching.
(b) Please describe the probable pattern in Fourier plane if the input image is shown as Fig. 3 ?
5. Please calculate the angle of the polarization direction between A and B (Fig.4).
作業二
1. (a) Please explain the theory of holography.
(b) Plot the set-ups of the transmission type hologram and reflection type hologram.
20%
2. (a) Plot the set-up of a scanning type lasermeter.
(b) explain : PIN and CCD image sensor.
20%
3. A fiber: the index refraction of the core = 1.6
the index refraction of the cladding = 1.4
find: N.A.=?
15%
4. A spherical-mirror resonators is constructed of two mirrors of radius -6m and 20m, and separated by a distance 3m. Please discuss the stability of this resonator.
15%
5. Derive the relationship of ray angle and position for a ray propagation in a graded- index fiber.
15%
6. We measure a He-Ne laser the radius of spot 1mm and 1.2 mm at the distance 1m and 2m behind the laser head. Please calculate the waist of this laser.
15%