## Subject Index

Abbe number 155,157,186,195, 221, 405

Abbe sine condition 37, 85, 86, 89, 117, 119-121

- graphical demonstration 119 Aberration 3, 29, 33, 41, 57, 65, 70, 89,

- angular see lateral

- astigmatism see Astigmatism

- axisymmetric 134

- "central" 349,351,374

- chromatic 6, 8, 9,10, 14,107,124, 146,148,152,160,165,167,182,183, 186, 191, 193, 206, 208, 230, 260, 326, 331, 339, 347, 351, 353, 363, 364, 376, 379, 381, 383, 384, 406, 409, 411

- chromatic (lateral) 170,196, 345, 384, 389, 390, 395, 407

- chromatic (longitudinal) 146,163, 193, 195, 212, 214, 218, 349, 394, 396

- chromatic variation 146-148, 394

- classical 288

- coefficient 64, 65,139, 233, 307, 310, see also Seidel

- coma see Coma

- decentering 261,269,394

- decentering astigmatism 269

- decentering coma see Coma

- despace see Despace

- distortion see Distortion

- family 61,63,290,292 -field 93,101,111,140,142-144,

- field curvature see Field curvature

- field dependence 62

- fifth order 60, 85,174

- first order (Gaussian) 60,61,69, 136,139,146

- first order chromatic 146, 349

- formulae 78

- Gaussian see first order

- geometrical 27

- higher order 57, 62, 82, 85, 117, 145, 160, 161, 169, 255, 278, 333, 339, 356, 359, 381

- higher order chromatic 339, 345, 347, 348, 359, 363-366, 368, 384, 407, 409

- higher order field 152, 351

- higher order theory 85, 86

- large (relative to diffraction limit) 312, 320, 321

- lateral (angular) 13, 57, 58, 64, 65, 85, 87, 90,121,122,130,131,133, 134,138, 139, 156, 161, 190, 283

- lateral chromatic see chromatic (lateral)

- longitudinal 57,58,65,130

- monochromatic 146-148, 193, 339

- near diffraction limit 304-312

- primary chromatic 169

- primary longitudinal chromatic 150, 358

- pupil 33,411,416

- quasi-telecentric 405

- Seidel 61, 64, 89,114,145, 327, 329, see also third order

- spherical see Spherical aberration

- spherochromatism see Spherochro-matism

- symmetrical 310, 314

- theory 5, 41, 42, 48, 50, 55, 57, 69, 109,111,128,396

- third order (Seidel) monochromatic 59-63, 65, 66, 70, 80-82, 85, 90,128, 141,144,146,158,177,185, 201, 238, 270, 280

- third order chromatic 146

- third order theory 126,128

- total 306

- transverse see lateral

- transverse chromatic 94,124,160, 172, 175, 201, 202, 207, 212, 222, 352, 358

- wavefront 60, 64-66,69,88,127129, 131, 132,134-136,138-140, 142,145,153,155,158,167, 283, 314, 328

Aberration coefficient see Seidel Aberration function see Aberration Absorption 165, 314, 359, 394 Access (image) 115 Accuracy

- third order 186 Achromat see Corrector

- thin doublet for FR or FE 404 Achromatic doublet (objective) 8, 14,

36,144,163, 164

- manufacture 14 Achromatisation 163, 164, 339, 359,

404, 407

Achromatism 146, 169, 259, 350, 351,

368,369,373,380,384,432 Active control 62, 69, 111, 242, 245, 252, 255, 272, 277, 293, 449, 450, 457, 463

Active correction see Active control Active optics see Active control ADC see Atmospheric Dispersion

Correction Afocal case 32, 33, 36, 40, 42, 54, 55, 78-80, 82, 92, 93, 96, 98,102,104,105, 107-109, 272, 282, 283, 285 Afocal corrector see Corrector

Afocal feed system 55, 238, 246, 250 Afocal mode 54

Afocal supplementary lens system 55 Afocal system 48, 55, 221

- definition 31

Air 30,31,36,39,43

Airy disk 259, 299, 300, 320, 405 Alignment 17, 86, 269

- Schmidt 161

Aluminium (reflecting coat) 204, 219, 241,449

- vacuum evaporation 204,241,447 Amateur 109,186,188,191,193,217,

222, 231, 256, 304, 320, 405 Analysis see also Theory

- chemical 259

- third order 69, 88, 90,180 Anastigmat see Reflector Anastigmatism 227, 242, 259, 260,

278, 352 Angle

- azimuth 60,133 Angular field see Field angle Aperture 21, 31, 60, 66, 71, 82, 85,128,

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