Abstract

Two new commercial monochromators for the uv, visible, and ir are described, and their performance characteristics are given.

© 1965 Optical Society of America

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Figures (11)

Fig. 1
Fig. 1

Mirror monochromator SPM 1.

Fig. 2
Fig. 2

Path of rays in mirror monochromator SPM 1. 1, entrance slit; 2, collimating mirror; 3, plane mirror; 4, prism; 4a, center of rotation for prism and plane mirror; 5, concave mirror; 6, exit slit.

Fig. 3
Fig. 3

Interior view of mirror monochromator SPM 1.

Fig. 4
Fig. 4

Schematic representation of the path of rays in mirror monochromator SPM 2. 1, off-axis, tilted parabolic mirror; 2, entrance slit; 3, dispersing prism; 4, plane mirror; 5, autocollimation mirror; 6, common axis of rotation of Wadsworth and autocollimation mirrors; 7, reflecting prism; 8, exit slit.

Fig. 5
Fig. 5

Mirror monochromator SPM 2.

Fig. 6
Fig. 6

Spectral bandwidth for the dispersing agents used in the SPM 2 in the wavelength region from 200 nm to 1500 nm (slit-width 0.1 mm). The spectral bandwidths of the quartz and LiF prisms are the same for those wavelength regions in which both prisms are applicable (see Table I). a, NaCl 56°; b, flint glass G 60°; c, quartz Si 68° (LiF 82°); d, grating 650 lines mm.

Fig. 7
Fig. 7

Spectral bandwidth attainable in the ir spectral region with mirror monochromator SPM 2 (slit-width 1 mm). a, LiF 82° (quartz Si 68°); b, flint glass G 60°; c, NaCl 56°; d, KBr 67°; e, KRS 5.

Fig. 8
Fig. 8

Light intensity of the SPM 1 and SPM 2 (emergent radiant flux/spectral bandwidth) vs spectral bandwidth at the wavelength λ = 589 nm. ○—mirror monochromator SPM 1; ●—mirror monochromator SPM 2; a, light intensity; b, spectral bandwidth.

Fig. 9
Fig. 9

Resolution of the sodium D lines with the SPM 2 at different slit-heights when using a flint glass prism (records were made with the Zeiss standard compensating recorder). The multiplication level of the receiving devices was matched to the available radiant energies. (a) Slit-width 0.01 mm, slit height 3 mm. (b) Slit-width 0.01 mm, slit height 20 mm.

Fig. 10
Fig. 10

Resolution of the sodium D lines with the SPM 2 when using a diffraction grating (650 lines/mm). Recordings were made with the Zeiss standard compensating recorder. Slit-width 0.01 mm, slit height 2.3 mm.

Fig. 11
Fig. 11

SPM 2, schematic representation: 1, lamp for illuminating the wavelength scale (17); 2, contact bridge for (1); 3, prism stool with prism; 4, entrance slit; 5, prism table with contact socket; 6, Wadsworth mirror, firmly fixed to prism table; 7, autocollimation mirror; 8, frosted screen for wavelength projection; 9, scale selector; 10, slotted screw for adjusting the wavelength setting; 11, tangential screw for wavelength setting; 12, plane plate for the lateral displacement of the wavelength scale (see 10); 13, exit slit; 14, carrier for wavelength scale (17); 15, deflecting prism with two reflecting surfaces; 16, carriage with projecting lens; 17, graduated plate with wavelength scales; 18, off-axis parabolic mirror.

Tables (1)

Tables Icon

Table I Dispersing Prisms and Diffraction Gratings for Mirror Monochromator SPM 2. (The dispersing prisms listed are also used for mirror monochromator SPM 1.)

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