ERIC Number: ED025933
Record Type: RIE
Publication Date: 1963-Apr
Reference Count: N/A
Practical Application of Polarization and Light Control for Reduction of Reflected Glare.
Crouch, C. L.; Kaufman, J. E.
Illuminating Engineering, v58 n4 p277-291 Apr 1963
The role of reflected glare and visual viewing angles in near task performance is discussed, and following statements are reported--(1) a worker at a desk normally assumes a position in which his eyes traverse an area of work extending from a point approximately vertically below his eyes to a point not more than 40 degrees from the vertical, (2) a horizontal task viewed at greater than 40 degrees from the vertical is distorted and the size of the task is reduced, (3) illumination levels must be increased by the order of 5 to 50 times when the task lies between 40 and 60 degrees from the vertical, (4) seated posture becomes distorted when viewing a task in a 40-60 degree zone, and (5) as viewing distance and viewing angles increase, there is a marked increase in incidence of errors in reading printed letters. A discussion of the above points by H. Richard Blackwell, Director of the Institute for Research in Vision, is also included. (RH)
Descriptors: Controlled Environment, Design Requirements, Glare, Human Posture, Lighting, Task Performance, Vision, Visual Acuity, Visual Discrimination, Visual Environment
Illiminating Engineering, 345 E. 47th Street, New York, New York 10017
Publication Type: N/A
Education Level: N/A
Authoring Institution: N/A
Note: Reprint from Illuminating Engineering, v58 n4 Apr 1963