Media height non-uniformity detection

A system for detecting a web media height non-uniformity, comprising:

• a roller to apply a wrapping tension to a web media;
• a first optical transmitter and first optical receiver pair, wherein the first optical transmitter is adjacent to an end of the roller and is to cause a first light beam to shine along a first path towards an opposite end of the roller, the first light beam to encounter wrapped media along the first path, wherein the first optical receiver is to measure intensity of the first light beam;
• a second optical transmitter and first optical receiver pair, wherein the second optical transmitter is adjacent to an end of the roller and is to cause a second light beam to shine along a second path towards an opposite end of the roller, wherein the second optical transmitter and the second optical receiver pair is positioned such that the second light beam will not encounter wrapped media along the second path, wherein the second optical receiver is to measure intensity of the second light beam;
• a first intensity measurement engine, to receive data indicative of a measurement of intensity of the first light beam:
• a second intensity measurement engine, to receive data indicative of a measurement of intensity of the second light beam;
• and
• an identification engine, to identify a media height non-uniformity based upon the measured intensities of the first and second light beams.

A printer, comprising:

• a print engine to form an image upon a web media during a printing operation;
• a supply reel to provide the web media during the printing operation;
• a take-up reel for collection of the web media after the image is formed upon the web media;
• a roller to apply a wrapping tension to the web media;
• a web media height non-uniformity detection system, including
• a first optical transmitter positioned adjacent to an end of the roller, to cause a first light beam to shine along a first path towards an opposite end of the roller such that the first light beam will be impacted by wrapped media along the first path,
• a first optical receiver positioned adjacent to an opposite end of the roller to measure strength of the first light beam,
• a second optical transmitter positioned adjacent to an end of the roller, to cause a second light beam to shine along a second path towards an opposite end of the roller such that the second light beam will not be impacted by wrapped media along the second path,
• a second optical receiver positioned adjacent to an opposite end of the roller to measure strength of the second light beam, and
• a media height non-uniformity identification component to identify a media height non-uniformity based upon the measured strengths of the first and second light beams, and to initiate a remedial action in response to such identification.