Light Calculations and Measurements

Keitz, H. A. E.; Finkelstein, Nisson A.

doi:10.1119/1.1934160

Cited by 6 publications

(6 citation statements)

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“…The Keitz method, based on the work of Keitz (1971), is a demonstrated method of determining the total output power, P, of monochromatic (254 nm) low pressure lamps (Sasges et al 2007). The geometry of the measurement system is shown in Figure 2.…”

Section: Keitz Methodsmentioning

confidence: 99%

Evaluation of the Keitz Method for Quantifying the UV Output of Medium Pressure Mercury Lamps

Daynouri

Robinson

2012

Ozone: Science & Engineering

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Section: Keitz Methodsmentioning

confidence: 99%

Evaluation of the Keitz Method for Quantifying the UV Output of Medium Pressure Mercury Lamps

Daynouri

Robinson

2012

Ozone: Science & Engineering

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“…A ring-shaped light source is used for this purpose. Generally, a ring-shaped light source can be regarded as a point-light source if the distance between the source and an object is greater than 10 times the diameter of the ring [19]. Therefore, when the ringshaped light source and the camera share their central axes, they produce the same effect as using a pointlight source.…”

Section: Principle Of Measurementmentioning

confidence: 98%

Measuring the distance and orientation of a planar surface using nonstructured lighting

Tsukiyama¹

1996

Systems & Computers in Japan

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SUMMARYThis paper proposes a method of 3-dimensional measurement of a planar surface by using two fixed light sources and a TV camera. A set of two images is recorded by the camera switching on each light alternately. The peak of the luminance distribution in each image is detected, and the orientation and distance of the planar surface are calculated. The position of the peak of a luminance distribution can be estimated accurately by using an image processing. The light sources can be conventional apparatus with no particular structure. The method is simple and suitable for a vision system on an indoor mobile robot.

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“…The photometric centroid can be determined experimentally; 24 however, this is a time consuming process. Furthermore, the photometric centroid may change with the angle of JOURNAL OF IES / OCTOBER 1972 measurement (e.g., from louvers to lamp with a louvered luminaire).…”

Section: Luminaire Stabilizationmentioning

confidence: 99%

IES Approved Method for Photometric Testing of Indoor Fluorescent Luminaires

1972

Journal of the Illuminating Engineering Society

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Light Calculations and Measurements

Cited by 6 publications

References 0 publications

Evaluation of the Keitz Method for Quantifying the UV Output of Medium Pressure Mercury Lamps

Evaluation of the Keitz Method for Quantifying the UV Output of Medium Pressure Mercury Lamps

Measuring the distance and orientation of a planar surface using nonstructured lighting

IES Approved Method for Photometric Testing of Indoor Fluorescent Luminaires

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