Spherical mirror

Kugel-spiegel, m. spherical mirror, -stopfen, m. bulb stopper, globular stopper, -symmetrie,... 

No matter where is situated, its image will appear as indicated in Figure 4-12, but the quality of the image will vary owing to spherical aberration. For a spherical mirror, this aberration is least and virtually absent if... 

For a spherical mirror the conjugate points lie on top of each other at the center of curvature (COC). Light emitted from the COC of the spherical mirror will focus back onto the COC without any additional system aberration. 

Herriott, D H. Kogelnik, and R. Kompfner, Off-Axis Paths in Spherical Mirror Interferometers, Appl. Opt., 3, 523-526 (1964). 

M3, which compensates for aberrations and yields an excellent quality of image b) Czerny-Turner design, similar in conception, incorporating two spherical mirrors. M and jf/4 c) design with a concave grating (7( allowing simultaneous dispersion and focusing of the radiation. The spectral bandwidth of these monochromators depends on the width of the entrance and exit slits, F, and F2-... 

Fig. 1. Schematic of experimental setup. %J2 - 800 nm wave-plate SP 2-mm sapphire plate PI, 2 45° quartz prisms P3 69° quartz prism, the distance from P3 to the NOPA crystal is 80 cm CM1, 2 ultrabroadband chirped mirrors GR 300 lines/mm ruled diffraction grating (Jobin Yvon) SM spherical mirror, R=-400 mm BS1, 2 chromium-coated d=0.5 mm quartz beam splitters. SHG crystal 0.4-mm 0=29° BBO (EKSMA) NOPA crystal 1-mm 0=31.5° BBO (Casix) SHG FROG crystal 0=29° BBO wedge plate d=5- -20 pm (EKSMA). Spherical mirrors around NOPA crystal are R=-200 mm Thick arrows on the left indicate the data flow from the pulse diagnostic setup (SHG FROG) and the feedback to the flexible mirror.

Figure 7.8 Outline of a grating monochromator. S, slit Mj, M2, spherical mirrors D, diffraction grating W, wall P, photographic plate...

In order to avoid any influence of laser induced chemistry, laser power was limited to about 1% of the saturation parameter for each of the species monitored. The laser beam passed horizontally through the flame and fluorescence was monitored at 90° to the beam. The fluorescence was collected by a spherical mirror, passed through a 90° image rotator and imaged with unit magnification onto the entrance slit of the monochromator. The collection optics were matched to the monochromator aperture. 

This is a useful prerequisite for the optimization of sample arrangements the low intensity of the Raman radiation can be considerably enhanced by utilizing multiple reflections of the exciting and the emerging Raman radiation at the sample and an external spherical mirror. 

Figure 3.5-10 Scanning micro arrangements for Raman spectroscopy a normal sample arrangement b arrangement using a microscope and fiber optics c scanning of surfaces with liber optics and half-spheric mirror, which reflects the part of the exciting and Raman radiation back to the sample which is not directly collected by the fiber bundle (Schrader, 1990).

Between the spherical mirror and the ellipsoidal mirror, in the center of the diagram, is a beam splitter that reflects a portion of the incident... 

A given mesh reflectivity imposes a lower bound for the beam-waist radius, below which appreciable coupling losses can occur. The basic problem is that a Gaussian beam will continue to diverge upon repeated reflection within a planar interferometer as shown in Fig. 12b. If the spherical mirror of the cavity is designed to match the original (input) beam waist, beam divergence will cause a mismatch at the output, which... 

Fig. 24. KineticaDy measuring reflectometer in the Ektachem. 1 stepping motor, 2 lens system, 3 filter rotor, 4 lens system (collimator), 5 slide in the incubator, 6 filter, 7 aperture, 8 spheric mirror, 9 quartz halogen lamp, 10 objective lens system, 11 infrared filter, 12 mirror, 13 diaphragm, 14 photodetector.

With a plane grating several mountings (Fig. 19) can be used. In the Czerny-Turner mounting, two spherical mirrors with slightly different focal lengths are... 

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