Far-IR morphology-correlated structure has been noted in the visible range in the present multicolor images of isolated, medium-high latitude Galactic 'cirrus' clouds; the scale of the structure ranges from 30 arcsec to more than 10 arcmin. The novel imaging technique used a mosaic of contiguous CCD frames. The red B(J)-R color of the 'cirrus' is not due to H-alpha emission. Visible/100-micron brightness ratios are used to investigate the nature of a faint, extended optical component seen in a deep CCD survey of high-redshift galaxies which is known to be unrelated to galactic dust.
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Guhathakurta et al. (1989) studied this question.