Method of manufacture of line plates, scales, and the like

• US 2,999,034 A
• Filed: 10/21/1960
• Issued: 09/05/1961
• Est. Priority Date: 10/21/1960
• Status: Expired due to Term

• Current Assignee: Dr. Johannes Heidenhain GmbH
• Original Assignee: Dr. Johannes Heidenhain GmbH
• Inventors: JOHANNES HEIDENHAIN
• Application Number:
  US04/064,202
• Time in Patent Office: 319 Days
• US Class Current: 427/167
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3605 Coatings of the type glass/metal/inorganic compound
• CPC Class Codes: C03C 17/3613 Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other
• CPC Class Codes: C03C 17/3649 made of metals other than silver
• CPC Class Codes: C03C 17/3657 the multilayer coating having optical properties
• CPC Class Codes: C23C 14/024 Deposition of sublayers, e.g. to promote adhesion of the coating C23C14/027 takes precedence
• CPC Class Codes: C23C 14/042 using masks
• CPC Class Codes: C23F 1/02 Local etching
• CPC Class Codes: G01B 3/004 Scales; Graduations
• CPC Class Codes: G03F 7/0005 Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
• CPC Class Codes: Y10T 29/49204 Contact or terminal manufacturing

Claims

1. A METHOD OF MANUFACTURING LINE PLATES, SCALES, AND THE LIKE, BY MEANS OF LAYERS APPLIED TO A CARRIER PLATE IN FORM OF VAPORS IN A HIGH VACUUM, COMPRISING THE STEPS OF APPLYING AT LEAST TWO SUPERPOSED LAYERS ONTO SAID CARRIER PLATE CARRYING A LINE BASE OF A DESIGN COMPLEMENTARY TO THAT OF THE LINE PLATES TO BE PRODUCED, ONE OF SAID LAYERS BEING A LAYER OF TRANSPARENT INORGANIC MATERIAL APPLIED WITH A THICKNESS CORRESPONDING WITH ONEQUARTER OF THE WAVE LENGTH OF THE LIGHT AT WHICH THE FINISHED LINE PLATE IS TO BE USED, AND THE OTHER OF SAID LAYERS BEING A LAYER OF NON-TRANSPARENT METAL MATERIAL, AND TREATING SAID TWO LAYERS TO REMOVE THE PART OF SAID LINE BASE OF A DESIGN COMPLEMENTARY TO THAT OF THE LINE PLATES TO BE PRODUCED TOGETHER WITH THE PORTIONS OF SAID TWO LAYERS CARRIED BY SAID LINE BASE.