Evolution of the Astronomical Eyepiece - Brayebrook Observatory

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appendix APPARENT LUMINANCE of TELESCOPIC IMAGE (cont.): The chart below illustrates the relationship between the exit pupil, eye pupil and the luminance ratio. It should be noted that no circumstance can occur in which the ratio exceeds 1.0k, hence the luminance of the telescopic image is always less than the naked eye image. 52
appendix APPARENT LUMINANCE of TELESCOPIC IMAGE The table below enumerates the relationship between the exit pupil, eye pupil and the luminance ratio. It should be noted that no circumstance can occur in which the ratio exceeds 1.0k, hence the luminance of the telescopic image is always less than the naked eye image. APPARENT LUMINANCE OF TELESCOPIC IMAGE Exit Pupilliary aperture mm Pupilliary aperture mm Pupil(mm) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.5 0.1141 0.0656 0.0432 0.0311 0.0238 0.0191 0.0159 0.0136 0.0119 1.0 0.4517 0.2599 0.1712 0.1231 0.0942 0.0755 0.0628 0.0538 0.0473 1.5 1.0000 0.5754 0.3790 0.2726 0.2086 0.1672 0.1391 0.1192 0.1047 2.0 0.9776 1.0000 0.6587 0.4737 0.3625 0.2906 0.2417 0.2071 0.1819 2.5 0.9498 0.9715 1.0000 0.7191 0.5503 0.4412 0.3670 0.3144 0.2761 3.0 0.9172 0.9382 0.9657 1.0000 0.7652 0.6135 0.5103 0.4373 0.3840 3.5 0.8807 0.9008 0.9272 0.9601 1.0000 0.8018 0.6669 0.5714 0.5018 4.0 0.8409 0.8602 0.8854 0.9168 0.9549 1.0000 0.8318 0.7127 0.6258 4.5 0.7988 0.8171 0.8410 0.8709 0.9070 0.9499 1.0000 0.8568 0.7524 5.0 0.7551 0.7724 0.7951 0.8233 0.8575 0.8980 0.9453 1.0000 0.8781 5.5 0.7107 0.7270 0.7483 0.7748 0.8070 0.8452 0.8897 0.9412 1.0000 6.0 0.6662 0.6815 0.7014 0.7263 0.7565 0.7922 0.8340 0.8822 0.9374 6.5 0.6223 0.6365 0.6552 0.6784 0.7066 0.7400 0.7790 0.8240 0.8756 7.0 0.5794 0.5927 0.6101 0.6317 0.6579 0.6890 0.7254 0.7673 0.8153 7.5 0.5381 0.5505 0.5666 0.5867 0.6111 0.6399 0.6737 0.7126 0.7572 8.0 0.4987 0.5102 0.5251 0.5438 0.5663 0.5931 0.6244 0.6605 0.7018 8.5 0.4615 0.4721 0.4859 0.5032 0.5240 0.5488 0.5777 0.6111 0.6494 9.0 0.4266 0.4363 0.4491 0.4651 0.4844 0.5073 0.5340 0.5649 0.6002 9.5 0.3940 0.4031 0.4149 0.4296 0.4474 0.4686 0.4933 0.5218 0.5544 10.0 0.3639 0.3722 0.3831 0.3967 0.4132 0.4327 0.4556 0.4819 0.5120 APPARENT LUMINANCE OF TELESCOPIC IMAGE Exit Pupilliary aperture mm Pupilliary aperture mm Pupil(mm) 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 0.5 0.0107 0.0098 0.0090 0.0085 0.0080 0.0077 0.0074 0.0072 0.0071 1.0 0.0424 0.0387 0.0358 0.0336 0.0318 0.0305 0.0294 0.0286 0.0279 1.5 0.0938 0.0856 0.0792 0.0743 0.0705 0.0675 0.0651 0.0633 0.0618 2.0 0.1630 0.1487 0.1377 0.1292 0.1225 0.1173 0.1132 0.1100 0.1075 2.5 0.2475 0.2258 0.2091 0.1961 0.1860 0.1780 0.1718 0.1669 0.1631 3.0 0.3442 0.3140 0.2908 0.2727 0.2586 0.2476 0.2389 0.2321 0.2268 3.5 0.4498 0.4103 0.3800 0.3564 0.3380 0.3235 0.3122 0.3034 0.2965 4.0 0.5610 0.5118 0.4739 0.4445 0.4215 0.4035 0.3894 0.3784 0.3697 4.5 0.6745 0.6153 0.5697 0.5344 0.5068 0.4851 0.4682 0.4549 0.4445 5.0 0.7872 0.7181 0.6649 0.6237 0.5914 0.5662 0.5464 0.5309 0.5188 5.5 0.8964 0.8177 0.7572 0.7102 0.6735 0.6448 0.6222 0.6046 0.5908 6.0 1.0000 0.9122 0.8447 0.7923 0.7514 0.7193 0.6941 0.6744 0.6591 6.5 0.9340 1.0000 0.9260 0.8685 0.8236 0.7885 0.7609 0.7393 0.7225 7.0 0.8697 0.9312 1.0000 0.9379 0.8895 0.8515 0.8217 0.7984 0.7802 7.5 0.8078 0.8648 0.9287 1.0000 0.9483 0.9078 0.8761 0.8512 0.8318 8.0 0.7486 0.8015 0.8608 0.9268 1.0000 0.9573 0.9238 0.8976 0.8772 8.5 0.6927 0.7417 0.7965 0.8576 0.9253 1.0000 0.9650 0.9377 0.9163 9.0 0.6403 0.6855 0.7362 0.7927 0.8553 0.9243 1.0000 0.9716 0.9495 9.5 0.5915 0.6332 0.6800 0.7322 0.7900 0.8538 0.9237 1.0000 0.9772 10.0 0.5462 0.5848 0.6280 0.6762 0.7296 0.7885 0.8531 0.9235 1.0000 53
Page 3 and 4: EVOLUTION of the ASTRONOMICAL EYEPI
Page 5 and 6: THE EVOLUTION of the ASTRONOMICAL E
Page 7 and 8: THE EVOLUTION of the ASTRONOMICAL E
Page 37 and 38: ZEISS ASTROPLANOKULAR - A 2-1-2 eye
Page 41 and 42: WHAT ARE THE BEST DESIGNS EVOLUTION
Page 43 and 44: THE EVOLUTION OF EYEPIECE DESIGN (C
Page 45 and 46: TESTING EYEPIECES EVOLUTION of the
Page 47 and 48: TESTING EYEPIECES (cont): EVOLUTION
Page 51: appendix APPARENT LUMINANCE of TELE
Page 55: BIBLIOGRAPHY LABORATOR Y INSTRUMENT
Page 60: EVOLUTION of the ASTRONOMICAL EYEPI

Evolution of the Astronomical Eyepiece - Brayebrook Observatory

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