| 1. | The Meade ACF telescope uses an OG530 Orange Schott Optical Glass Filter.
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| 2. | This is used for colored glass filters for various applications.
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| 3. | Applications in laboratory glassware include use in fritted glass filter items, scrubbers, or spargers.
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| 4. | The complementary color of blue is yellow-and yellow-tinted glasses filter out much of that blue light.
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| 5. | In permanent installations and some theatrical uses, colored glass filters or dichroic filters are being used.
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| 6. | Originally, three glass filters whose transmittance spectra mimicked the CIE color matching functions ( shown below ) were employed.
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| 7. | Throughout the 19th century " color healers " claimed colored glass filters could treat many diseases including constipation and meningitis.
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| 8. | Virginia Costa, an observatory employee, offered visitors a darkened glass filter to see the moon gradually nibble away at the sun.
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| 9. | Observatory employee Virginia Costa was on hand to offer darkened glass filters so visitors could watch the moon gradually nibble away at the sun.
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| 10. | He invented an enlarging camera ( 1852 ), a blue glass filter, and announced, but did not develop, a color photographic process ( 1856 ).
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