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Roy, Maitreyee ; Schmit, Joanna ; Hariharan, Parameswaran (2009) White-light interference microscopy: minimization of spurious diffraction effects by geometric phase-shifting Optics Express, 17 (6). pp. 4495-4499. ISSN 1094-4087

Hariharan, P. ; Roy, M. (2007) Improved pinhole spatial filter Optics & Laser Technology, 39 (1). pp. 155-156. ISSN 0030-3992

Schmit, Joanna ; Hariharan, Parameswaran (2007) Improved polarization mirau interference microscope Optical Engineering, 46 (7). No pp. given.. ISSN 0091-3286

Debnath, Sanjit K. ; Kothiyal, Mahendra P. ; Schmit, Joanna ; Hariharan, Parameswaran (2006) Spectrally resolved phase-shifting interferometry of transparent thin films: sensitivity of thickness measurements Applied Optics, 45 (34). pp. 8636-8640. ISSN 0003-6935

Schmit, Joanna ; Hariharan, Parameswaran (2006) Two-wavelength interferometric profilometry with a phase-step error-compensating algorithm Optical Engineering, 45 (11). 115602_1-115602_3. ISSN 0091-3286

Roy, Maitreyee ; Sheppard, Colin J. R. ; Cox, Guy ; Hariharan, Parameswaran (2006) White-light interference microscopy: a way to obtain high lateral resolution over an extended range of heights Optics Express, 14 (15). pp. 6788-6793. ISSN 1094-4087

Debnath, Sanjit K. ; Kothiyal, Mahendra P. ; Schmit, Joanna ; Hariharan, Parameswaran (2006) Spectrally resolved white-light phase-shifting interference microscopy for thickness-profile measurements of transparent thin film layers on patterned substrates Optics Express, 14 (11). pp. 4662-4667. ISSN 1094-4087

Debnath, Sanjit K. ; Kothiyal, Mahendra P. ; Schmit, Joanna ; Hariharan, Parameswaran (2006) Thickness-profile measurement of transparent thin-film layers by spectrally resolved phase-shifting interferometry Proceedings of SPIE, 6292 . 629214_1-629214_6. ISSN 0277-786X

Roy, Maitreyee ; Cox, Guy ; Hariharan, Parameswaran (2005) Low-coherence interference microscopy with an improved switchable achromatic phase-shifter Optics Express, 13 (22). pp. 9125-9130. ISSN 1094-4087

Hariharan, Parameswaran ; Ciddor, Philip E. ; Roy, Maitreyee (2005) Improved switchable achromatic phase shifters, part 2 Optical Engineering, 44 (10). 105603_1-105603_4. ISSN 0091-3286

Roy, Maitreyee ; Cooper, Ian ; Moore, Peter ; Sheppard, Colin ; Hariharan, Parameswaran (2005) White-light interference microscopy: effects of multiple reflections within a surface film Optics Express, 13 (1). pp. 164-170. ISSN 1094-4087

Roy, Maitreyee ; Sheppard, Colin ; Hariharan, Parameswaran (2004) Low-coherence interference microscopy using a ferro-electric liquid crystal phase-modulator Optics Express, 12 (11). pp. 2512-2516. ISSN 1094-4087

Hariharan, P. ; Sanders, Barry (2002) Four-photon interferometry for secure quantum key distribution Optics Express, 10 (21). pp. 1222-1226. ISSN 1094-4087

Hariharan, P. (2002) Broad-band apochromatic retarders: choice of materials Optics & Laser Technology, 34 (7). pp. 509-511. ISSN 0030-3992

Hariharan, Parameswaran (2002) Phase-shifting interferometry: measurements with high-reflectance surfaces Optical Engineering, 41 (4). pp. 856-859. ISSN 0091-3286

Hariharan, Parameswaran ; Pryputniewicz, Emily J. ; Pryputniewicz, Ryszard J. (2000) Minimization of systematic errors in phase-shifting interferometry: evaluation of residuals Proceedings of SPIE, 4101 . pp. 63-71. ISSN 0277-786X

Hariharan, Parameswaran (2000) Phase-shifting interferometry: minimization of systematic errors Optical Engineering, 39 (4). pp. 967-969. ISSN 0091-3286

Hariharan, P. (1999) Real-time and two-reference-beam hologram interferometry: effects of emulsion shrinkage Optics and Lasers in Engineering, 31 (5). pp. 339-344. ISSN 0143-8166

Hariharan, P. (1999) Superachromatic lens combinations Optics & Laser Technology, 31 (2). pp. 115-118. ISSN 0030-3992

Hariharan, Parameswaran ; Ciddor, Philip E. (1999) Improved switchable achromatic phase shifters Optical Engineering, 38 (6). pp. 1078-1080. ISSN 0091-3286

Hariharan, Parameswaran (1998) Interferometric measurements of deviations from flatness: some new techniques Proceedings of SPIE, 3479 . pp. 2-13. ISSN 0277-786X

Hariharan, Parameswaran (1998) Interferometric measurements of small-scale irregularities: highly reflecting surfaces Optical Engineering, 37 (10). pp. 2751-2753. ISSN 0091-3286

Hariharan, P. (1997) Apochromatic lens combinations: a novel design approach Optics & Laser Technology, 29 (4). pp. 217-219. ISSN 0030-3992

Hariharan, P. ; Ciddor, P. E. (1997) Broad-band optical isolator Optics & Laser Technology, 29 (2). pp. 83-84. ISSN 0030-3992

Hariharan, Parameswaran ; Ciddor, Philip E. (1997) Achromatic switchable polarization rotators Optical Engineering, 36 (3). pp. 952-956. ISSN 0091-3286

Hariharan, Parameswaran (1997) Interferometric measurements of small-scale surface irregularities: sources of errors Optical Engineering, 36 (8). pp. 2330-2334. ISSN 0091-3286

Hariharan, Parameswaran (1997) Interferometric testing of optical surfaces: absolute measurements of flatness Optical Engineering, 36 (9). pp. 2478-2481. ISSN 0091-3286

Cogswell, Carol J. ; Smith, Nicholas I. ; Larkin, Kieran G. ; Hariharan, Parameswaran (1997) Quantitative DIC microscopy using a geometric phase shifter Proceedings of SPIE, 2984 . pp. 72-81. ISSN 0277-786X

Hariharan, Parameswaran ; Ciddor, Philip E. (1997) Variable achromatic polarization rotators Optical Engineering, 36 (9). pp. 2563-2566. ISSN 0091-3286

Hariharan, P. (1996) Achromatic phase-shifting for white-light interferometry Applied Optics, 35 (34). pp. 6823-6824. ISSN 0003-6935

Hariharan, P. ; Roy, Maitreyee (1996) Achromatic phase-shifting for two-wavelength phase-stepping interferometry Optics Communications, 126 (4-6). pp. 220-222. ISSN 0030-4018

Hariharan, Parameswaran (1996) Achromatic and apochromatic halfwave and quarterwave retarders Optical Engineering, 35 (11). pp. 3335-3337. ISSN 0091-3286

Hariharan, Parameswaran ; Roy, Maitreyee (1996) Achromatic phase shifting for polarization interferometry Proceedings of SPIE, 2860 . pp. 100-106. ISSN 0277-786X

Hariharan, Parameswaran (1996) Optical flat surfaces: direct interferometric measurements of small-scale irregularities Optical Engineering, 35 (11). pp. 3265-3266. ISSN 0091-3286

Hariharan, Parameswaran (1996) Optical flat surfaces: direct measurements of the spatial frequency spectrum of surface errors Optical Engineering, 35 (2). pp. 484-485. ISSN 0091-3286

Hariharan, Parameswaran ; Suchting, Mark A. (1996) Optical flat surfaces: subtraction of small-scale irregularities of the reference surface Proceedings of SPIE, 2860 . pp. 306-312. ISSN 0277-786X

Hariharan, P. ; Ciddor, P. E. (1995) Achromatic phase-shifters: 2. A quantized ferroelectric liquid-crystal system Optics Communications, 117 (1-2). pp. 13-15. ISSN 0030-4018

Hariharan, Parameswaran ; Ciddor, Philip E. (1995) Achromatic phase-shifters for broadband interferometry Proceedings of SPIE, 2544 . pp. 185-192. ISSN 0277-786X

Hariharan, Parameswaran ; Brown, Nicholas ; Fujima, I. ; Sanders, Barry C. (1995) Heterodyne interferometry at the single-photon level Proceedings of SPIE, 2544 . pp. 140-147. ISSN 0277-786X

Roy, Maitreyee ; Hariharan, Parameswaran (1995) White-light geometric phase interferometer for surface profiling Proceedings of SPIE, 2544 . pp. 64-72. ISSN 0277-786X

Hariharan, P. ; Ciddor, P. E. (1994) An achromatic phase-shifter operating on the geometric phase Optics Communications, 110 (1-2). pp. 13-17. ISSN 0030-4018

Creath, Katherine ; Gilliand, Yves A. ; Hariharan, P. (1994) Interferometric testing of high-numerical-aperture convex surfaces Applied Optics, 33 (13). pp. 2585-2588. ISSN 0003-6935

Creath, Katherine ; Hariharan, P. (1994) Phase-shifting errors in interferometric tests with high-numerical-aperture reference surfaces Applied Optics, 33 (1). pp. 24-25. ISSN 0003-6935

Agarwal, Girish S. ; Hariharan, P. (1993) Interference of independent laser beams at the single-photon level: a field-theoretic description Optics Communications, 103 (1-2). pp. 111-115. ISSN 0030-4018

Hariharan, Parameswaran (1992) Laser interferometry: current trends and future prospects Proceedings of SPIE, 1553 . pp. 2-11. ISSN 0277-786X

Hariharan, P. (1991) Optical interferometry Reports on Progress in Physics, 54 (3). pp. 339-390. ISSN 0034-4885

Hariharan, Parameswaran (1991) Interferometry with laser diodes Proceedings of SPIE, 1400 . pp. 2-10. ISSN 0277-786X

Hariharan, P. (1990) Rehalogenating bleaches for photographic phase holograms. 3: Mechanism of material transfer Applied Optics, 29 (20). pp. 2983-2985. ISSN 0003-6935

Hariharan, P. ; Chidley, C. M. (1989) Bleached reflection holograms: a study of color shifts due to processing Applied Optics, 28 (3). pp. 422-424. ISSN 0003-6935

Hariharan, P. (1989) Phase-stepping interferometry with laser diodes: effect of changes in laser power with output wavelength Applied Optics, 28 (1). pp. 27-29. ISSN 0003-6935

Hariharan, P. ; Chidley, C. M. (1988) Rehalogenating bleaches for photographic phase holograms. 2: Spatial frequency effects Applied Optics, 27 (18). pp. 3852-3854. ISSN 0003-6935

Hariharan, P. (1988) Lateral and radial shearing interferometers: a comparison Applied Optics, 27 (17). pp. 3594-3596. ISSN 0003-6935

Hariharan, P. ; Chidley, C. M. (1988) Photographic phase holograms: spatial frequency effects with conventional and reversal bleaches Applied Optics, 27 (15). pp. 3065-3067. ISSN 0003-6935

Hariharan, P. ; Chidley, C. M. (1987) Rehalogenating bleaches for photographic phase holograms: the influence of halide type and concentration on diffraction efficiency and scattering Applied Optics, 26 (18). pp. 3895-3898. ISSN 0003-6935

Hariharan, P. ; Oreb, B. F. ; Freund, C. H. (1987) Stroboscopic holographic interferometry: measurements of vector components of a vibration Applied Optics, 26 (18). pp. 3899-3903. ISSN 0003-6935

Hariharan, P. ; Oreb, B. F. ; Eiju, T. (1987) Digital phase-shifting interferometry: a simple error-compensating phase calculation algorithm Applied Optics, 26 (13). pp. 2504-2506. ISSN 0003-6935

Hariharan, P. (1987) Digital phase-stepping interferometry: effects of multiply reflected beams Applied Optics, 26 (13). pp. 2506-2507. ISSN 0003-6935

Hariharan, P. (1987) Beam expander for making large rainbow holograms Applied Optics, 26 (10). p. 1815. ISSN 0003-6935

Hariharan, P. ; Chidley, C. M. (1987) Photographic phase holograms: the influence of developer composition on scattering and diffraction efficiency Applied Optics, 26 (7). pp. 1230-1234. ISSN 0003-6935

James, W. E. ; Hariharan, P. (1986) Line diffraction test Applied Optics, 25 (21). pp. 3806-3807. ISSN 0003-6935

Hariharan, P. ; Oreb, B. F. (1986) Stroboscopic holographic interferometry: application of digital techniques Optics Communications, 59 (2). pp. 83-86. ISSN 0030-4018

Hariharan, P. (1986) Silver halide sensitized gelatin holograms: mechanism of hologram formation Applied Optics, 25 (13). pp. 2040-2042. ISSN 0003-6935

Hariharan, P. ; Oreb, B. F. ; Brown, N. (1986) Computer-aided analysis of holographic interferograms using the phase-shift method: a comment Applied Optics, 25 (10). p. 1536. ISSN 0003-6935

Hariharan, P. (1986) Bleached photographic phase holograms: the influence of drying procedures on diffraction efficiency Optics Communications, 56 (5). pp. 318-320. ISSN 0030-4018

Chidley, C. M. ; Oreb, B. F. ; Hariharan, P. (1985) Motorized mirror assembly for beam switching Applied Optics, 24 (6). pp. 740-741. ISSN 0003-6935

Oreb, B. F. ; Sharon, B. ; Hariharan, P. (1984) Electronic speckle pattern interferometry with a microcomputer Applied Optics, 23 (22). pp. 3940-3941. ISSN 0003-6935

Wyant, J. C. ; Oreb, B. F. ; Hariharan, P. (1984) Testing aspherics using two-wavelength holography: use of digital electronic techniques Applied Optics, 23 (22). pp. 4020-4023. ISSN 0003-6935

Hariharan, P. ; Oreb, B. F. (1984) Two-index holographic contouring: application of digital techniques Optics Communications, 51 (3). pp. 142-144. ISSN 0030-4018

Hariharan, P. ; Oreb, B. F. ; Brown, N. (1983) Real-time holographic interferometry: a microcomputer system for the measurement of vector displacements Applied Optics, 22 (6). pp. 876-880. ISSN 0003-6935

Hariharan, P. (1982) Concentric etalon for single-frequency operation of high-power ion lasers Optics Letters, 7 (6). pp. 274-275. ISSN 0146-9592

Hariharan, P. ; Oreb, B. F. ; Brown, N. (1982) A digital phase-measurement system for real-time holographic interferometry Optics Communications, 41 (6). pp. 393-396. ISSN 0030-4018

Matsuda, K. ; Freund, C. H. ; Hariharan, P. (1981) Phase-difference amplification using longitudinally reversed shearing interferometry: an experimental study Applied Optics, 20 (16). pp. 2763-2765. ISSN 0003-6935

Hariharan, P. (1980) Holographic spatial filters: a modification to minimize beam obstruction Applied Optics, 19 (24). p. 4127. ISSN 0003-6935

Hariharan, P. (1980) Pseudocolour images with volume reflection holograms Optics Communications, 35 (1). pp. 42-44. ISSN 0030-4018

Hariharan, P. (1978) Double-exposure speckle interferometry with "instant" Polaroid film Optics Communications, 26 (3). pp. 325-326. ISSN 0030-4018

Hariharan, P. (1978) Hologram interferometry without a reference beam Optics Letters, 2 (5). pp. 122-123. ISSN 0146-9592

Hariharan, P. (1978) Binary pulse-position encoding for non-linear image processing Optics Communications, 24 (1). pp. 71-73. ISSN 0030-4018

Hariharan, P. (1977) Simple coherent-optical colour encoder Optics Communications, 22 (3). pp. 297-298. ISSN 0030-4018

Hariharan, P. ; Steel, W. H. ; Hegedus, Z. S. (1977) Multicolor holographic imaging with a white-light source Optics Letters, 1 (1). pp. 8-9. ISSN 0146-9592

Hariharan, P. ; Hegedus, Z. S. (1976) Two-hologram interferometry: a simplified sandwich technique Applied Optics, 15 (4). pp. 848-849. ISSN 0003-6935

Hariharan, P. (1976) Longitudinal distortion in images reconstructed by reflection holograms Optics Communications, 17 (1). pp. 52-54. ISSN 0030-4018

Hariharan, P. (1975) Speckle-shearing interferometry: a simple optical system Applied Optics, 14 (11). p. 2563. ISSN 0003-6935

Hariharan, P. (1975) Sagnac or Michelson-Sagnac interferometer? Applied Optics, 14 (10). 2319_1-2321. ISSN 0003-6935

Hariharan, P. (1975) Simple laser interferometer with variable shear and tilt Applied Optics, 14 (5). pp. 1056-1057. ISSN 0003-6935

Hariharan, P. ; Hegedus, Z. S. (1975) Double grating interferometers II. Application to collimated beams Optics Communications, 14 (1). pp. 148-151. ISSN 0030-4018

Hariharan, P. ; Hegedus, Z. S. (1975) Relative phase shift of images reconstructed by phase and amplitude holograms Applied Optics, 14 (2). pp. 273-274. ISSN 0003-6935

Hariharan, P. ; Hegedus, Z. S. (1975) Four-exposure hologram Moire interferometry and speckle-pattern interferometry: a comparison Applied Optics, 14 (1). pp. 22-23. ISSN 0003-6935

Hariharan, P. ; Steel, W. H. ; Wyant, J. C. (1974) Double grating interferometer with variable lateral shear Optics Communications, 11 (3). pp. 317-320. ISSN 0030-4018

Hariharan, P. ; Hegedus, Z. S. (1974) Measurement of symmetrical and anti-symmetrical deformations by hologram interferometry Optics Communications, 11 (2). pp. 127-131. ISSN 0030-4018

Hariharan, P. ; Steel, W. H. (1974) Liquid surface interferometry for the study of surface topography Applied Optics, 13 (4). pp. 721-722. ISSN 0003-6935

Hariharan, P. ; Hegedus, Z. S. (1974) Image contrast and resolution in holographic multiplexing by spatial division Optics Communications, 10 (3). pp. 238-242. ISSN 0030-4018

Hariharan, P. ; Hegedus, Z. S. (1973) Simple multiplexing technique for double-exposure hologram interferometry Optics Communications, 9 (2). pp. 152-155. ISSN 0030-4018

Hariharan, P. ; Ramanathan, C. S. ; Kaushik, G. S (1973) Monobath processing for holography Applied Optics, 12 (3). pp. 611-612. ISSN 0003-6935

Hariharan, P. (1973) Application of holographic subtraction to time-average hologram inteferometry of vibrating objects Applied Optics, 12 (1). pp. 143-146. ISSN 0003-6935

Hariharan, P. (1972) Bleached reflection holograms Optics Communications, 6 (4). pp. 377-379. ISSN 0030-4018

Hariharan, P. ; Kaushik, G. S. ; Ramanathan, C. S. (1972) Simplified, low-noise processing technique for photographic phase holograms Optics Communications, 6 (1). pp. 75-76. ISSN 0030-4018

Hariharan, P. ; Kaushik, G. S. ; Ramanathan, C. S. (1972) Reduction of scattering in photographic phase holograms Optics Communications, 5 (1). pp. 59-61. ISSN 0030-4018

Hariharan, P. ; Selvarajan, A. (1972) Double focus systems for holography Optics Communications, 4 (6). pp. 392-394. ISSN 0030-4018

Hariharan, P. ; Ramanathan, C. S. (1971) Suppression of printout effect in photographic phase holograms Applied Optics, 10 (9). 2197_1-2199. ISSN 0003-6935

Hariharan, P. ; Ramanathan, C. S. ; Kaushik, G. S. (1971) Simplified processing technique for photographic phase holograms Optics Communications, 3 (4). pp. 246-247. ISSN 0030-4018

Hariharan, P. (1971) Reversal processing technique for phase holograms Optics Communications, 3 (2). pp. 119-121. ISSN 0030-4018

Hariharan, P. (1970) Evaluation of the modulation transfer function of photographic materials using a laser speckle pattern Applied Optics, 9 (6). 1482_1-1484. ISSN 0003-6935

Hariharan, P. (1969) Partial coherence and localization of fringes in two-beam interference Journal of the Optical Society of America, 59 (10). p. 1384. ISSN 0030-3941

Hariharan, P. (1969) Transformation of a laser beam to fill a narrow slit Applied Optics, 8 (10). p. 2148. ISSN 0003-6935

Hariharan, P. (1969) Modified Mach-Zehnder interferometer Applied Optics, 8 (9). pp. 1925-1926. ISSN 0003-6935

Hariharan, P. (1969) Optical, decimal-to-binary encoder Applied Optics, 8 (4). 833_1-834. ISSN 0003-6935

Hariharan, P. ; Sen, D. (1961) Dispersion measurements with three-beam and double-passed two-beam interferometers Journal of the Optical Society of America, 51 (11). 1305_1-1306. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1961) Double-passed two-beam interferometers. II. Effects of specimen absorption and finite path difference Journal of the Optical Society of America, 51 (11). pp. 1212-1218. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1961) Effects of partial coherence in two-beam interference Journal of the Optical Society of America, 51 (11). p. 1307. ISSN 0030-3941

Hariharan, P. ; Singh, R. G. (1961) Random, plane-polarized components in ordinary, unpolarized light Journal of the Optical Society of America, 51 (10). pp. 1148-1149. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1961) Fringes of equal inclination in the double-passed Michelson interferometer Journal of the Optical Society of America, 51 (6). pp. 617-619. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1961) Double-passed Fabry-Perot interferometer Journal of the Optical Society of America, 51 (4). pp. 398-399. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1961) Double-passed Fizeau interferometer. II. Fringe systems formed by the reflected beams Journal of the Optical Society of America - A, 51 (4). pp. 400-404. ISSN 1084-7529

Hariharan, P. ; Sen, D. (1960) Half-shade setting system for the Michelson interferometer Journal of the Optical Society of America, 50 (10). pp. 1026-1027. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1960) The double-passed Fizeau interferometer Journal of the Optical Society of America, 50 (10). pp. 999-1001. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1960) Double-passed two-beam interferometers Journal of the Optical Society of America, 50 (4). pp. 357-360. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1959) Triangular path macro-interferometer Journal of the Optical Society of America, 49 (11). p. 1105. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1959) Simple photoelectric setting method for interferometric measurements Journal of the Optical Society of America, 49 (9). 930_1-931. ISSN 0030-3941

Hariharan, P. ; Singh, R. G. (1959) Achromatic fringes formed in a triangular path interferometer Journal of the Optical Society of America, 49 (7). pp. 732-733. ISSN 0030-3941

Hariharan, P. ; Sen, D. (1959) New gauge interferometer Journal of the Optical Society of America, 49 (3). pp. 232-234. ISSN 0030-3941

Hariharan, P. ; Bhalla, M. S. (1957) Simple logarithmic ratio-recording spectrophotometer attachment Journal of the Optical Society of America, 47 (5). pp. 378-379. ISSN 0030-3941

Hariharan, P. (1956) Resolving power of photographic emulsions Journal of the Optical Society of America, 46 (5). pp. 315-323. ISSN 0030-3941

Hariharan, P. (1955) Resolution of an annulus test object Journal of the Optical Society of America, 45 (1). pp. 44-45. ISSN 0030-3941

Hariharan, P. (1955) An evaluation of film speeds obtained with Kodak SD-19A developer Journal of the Optical Society of America, 45 (1). p. 60. ISSN 0030-3941