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Programmable spectrophotometer using a data memory for storing a sequence of generalized commands

  • US 5,400,138 A
  • Filed: 11/20/1992
  • Issued: 03/21/1995
  • Est. Priority Date: 11/20/1992
  • Status: Expired due to Term
First Claim
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1. A color measuring system including a portable spectrophotometer comprising:

  • a light source for illuminating an object to be measured;

    color measuring apparatus including photodetectors generating electrical output signals representative of light reflected from an object to be measured;

    a programmable processor connected to the color measuring apparatus and including a read-only program memory and a random-access data memory for executing machine executable instructions permanently stored in the program memory and selectively reading data from and writing data into the data memory;

    the program memory including a command interpreter program identifying a plurality of predefined generalized commands and a predefined sequence of machine executable instructions for each of the plurality of predefined generalized commands identified in the command interpreter program;

    the data memory comprising a command buffer storing data defining a sequence of selected ones of the generalized commands;

    the processor executing the command interpreter program by reading each of the generalized commands of the sequence of generalized commands in the command buffer and by executing for each generalized command read from the command buffer a corresponding one of the predefined sequences of machine executable instructions.

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