论文信息 - Multiple-Sine-Slit Microdensitometer and MTF Evaluation for High Resolution Emulsions. 1: Theory and Mode of Operation.

Multiple-Sine-Slit Microdensitometer and MTF Evaluation for High Resolution Emulsions. 1: Theory and Mode of Operation.

The Multiple-Sine-Slit Microdensitometer (MSSM) measures transmittance modulation by scanning the sample with a sinusoidal irradiance distribution generated by laser two-beam interference. The theory of the instrument is derived both from conventional microdensitometry and from treating the sample as a complex valued grating that diffracts two impinging coherent fields. The instrument has a constant MTF of 0.5; its principle disregards any phase modulations in the sample; and its large measuring area improves signal-to-noise ratio by 1-2 orders of magnitude. These are necessary qualifications for determining the MTF of recording materials of very high resolution. With a He-Ne laser, the range of the MSSM spans from 4 c/mm to 1500 c/mm. The practical implementations of the evaluation of film MTF's with this system are described.

K. Biedermann | K Biedermann | S Johansson | S. Johansson

[1] K. Biedermann,et al. Development effects and the MTF of high-resolution photographic materials for holography* , 1974 .

[2] K. Biedermann. Attempts to increase the holographic exposure index of photographic materials. , 1971, Applied optics.

[3] Robert L. Lamberts,et al. Optical-Path Variation in a Photographic Emulsion , 1970 .

[4] W. F. Berg. The photographic emulsion layer as a three-dimensional recording medium. , 1969, Applied optics.

[5] Howard M. Smith. Photographic Relief Images , 1968 .

[6] G F Adams,et al. Recording parameters of spatially modulated coherent wavefronts. , 1967, Applied optics.

[7] R. A. Jones,et al. Elimination of microdensitometer degradation from scans of photographic images. , 1966, Applied optics.

[8] Robert L. Lamberts,et al. Sine-Wave Response Techniques in Photographic Printing* , 1961 .

[9] J. A. Eyer. Spatial Frequency Response of Certain Photographic Emulsions , 1958 .

[10] J. Viénot. Determination of the Fourier Spectra of Photographic Images , 1958 .

[11] G. Langner,et al. The Evaluation of the Modulation Transfer Function of Photographic Materials. The Interaction of the Modulation Transfer Function of the Instruments, and of the Characteristic Curve , 1967 .

[12] J. Wilczynski. Some Properties of Photographic Image Recording , 1961 .