Abstract

Several ways of combining narrow bandwidth interference filters with a Schmidt camera, of 1.2-m aperture, are described. A completely telecentric method is proposed in which very narrow filters can be used.

© 1978 Optical Society of America

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References

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  1. J. Meaburn, Astrophys. Space Sci. 1, 166 (1968).
    [CrossRef]
  2. K. H. Elliott, Appl. Opt. 16, 000 (1977).
    [CrossRef]
  3. C. R. Pidgeon, S. D. Smith, J. Opt. Soc. Am. 54, 1459 (1964).
    [CrossRef]
  4. J. Meaburn, Detection and Spectrometry of Faint Light (Reidel, Dordrecht, 1976).
    [CrossRef]

1977

K. H. Elliott, Appl. Opt. 16, 000 (1977).
[CrossRef]

1968

J. Meaburn, Astrophys. Space Sci. 1, 166 (1968).
[CrossRef]

1964

Elliott, K. H.

K. H. Elliott, Appl. Opt. 16, 000 (1977).
[CrossRef]

Meaburn, J.

J. Meaburn, Astrophys. Space Sci. 1, 166 (1968).
[CrossRef]

J. Meaburn, Detection and Spectrometry of Faint Light (Reidel, Dordrecht, 1976).
[CrossRef]

Pidgeon, C. R.

Smith, S. D.

Appl. Opt.

K. H. Elliott, Appl. Opt. 16, 000 (1977).
[CrossRef]

J. Opt. Soc. Am.

Space Sci.

J. Meaburn, Astrophys. Space Sci. 1, 166 (1968).
[CrossRef]

Other

J. Meaburn, Detection and Spectrometry of Faint Light (Reidel, Dordrecht, 1976).
[CrossRef]

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Figures (5)

Fig. 1
Fig. 1

The quasi-telecentric combination of a flat mosaic interference filter with a Schmidt camera.

Fig. 2
Fig. 2

The angle from the filter normal i vs the corresponding change in wavelength Δλ (at Hα) for various configurations.

Fig. 3
Fig. 3

A 5-h exposure through a 109-Å bandpass filter (μ* = 2) combined quasi-telecentrically with the SRC 1.2-m aperture, f/2.5, SRC Schmidt (Plate center α = 7h, 20 min, δ = −46° 00)

Fig. 4
Fig. 4

The perfectly telecentric combination. Here the mosaic interference filter is deposited on a surface of radius of curvature of 305 cm, matching that of the focal plane.

Fig. 5
Fig. 5

For very narrow bandwidths an annulus can be placed across the aperture. The amount transmitted for the field center is shown unshaded. All parts of the field are treated equally (not shown).

Tables (1)

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Table I Approximate Limitations of Commercial Filters

Equations (6)

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cos [ arcsin ( sin i / μ * ) ] 1 = Δ λ / λ 0 ,
π 2 i 2 180 2 × 2 μ * 2 δ λ λ 0 .
a Ω = A ρ ,
Ω π 3 180 2 ( 10 2 6 2 ) 0.061 sr ,
ρ π 2 180 2 6 2 0.011 sr ,
A 5713 cm 2 ,

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