Resources Contact Us Home
Process and device for copying photographic color images

Image Number 2 for United States Patent #4050807.

A blocking filter is used, in conjunction with the substractive filter method of copying photographic color images, to remove or substantially remove by greatly weakening wave lengths from the copying light in the range in which the filter characteristics of the blue and green color filters or the spectral sensitivity curves of photographic copying paper overlap each other, or more particularly in a 30 nm belt about a central wave length of approximately 500 nm.

  Recently Added Patents
Light-emitting device
Portable computer
Data modulation for groups of memory cells
Single well reservoir characterization apparatus and methods
Nanofibers containing latent reactive groups
Method for manufacturing photoelectric conversion device
Flexure with insulating layer isolating a portion of a metal substrate
  Randomly Featured Patents
Light reflector
Second order noise coupling with zero optimization modulator and method
Image processing apparatus
Postage meter printwheel setting apparatus
Eimeria antigenic composition which elicits antibodies against avian coccidiosis
System and method for local deformable motion analysis
Method and system for delivering multi-band broadcast services in wavelength division multiplexed passive optical networks
Procedure and device for controlling an exhaust gas purification system
Diaper buddy
Cellulose acylate film, polarizing plate and liquid crystal display device