JPS6415078A - Indoor tennis court - Google Patents

Indoor tennis court

Info

Publication number
JPS6415078A
JPS6415078A JP17000787A JP17000787A JPS6415078A JP S6415078 A JPS6415078 A JP S6415078A JP 17000787 A JP17000787 A JP 17000787A JP 17000787 A JP17000787 A JP 17000787A JP S6415078 A JPS6415078 A JP S6415078A
Authority
JP
Japan
Prior art keywords
wall
light intensity
reflectance
tennis court
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17000787A
Other languages
Japanese (ja)
Inventor
Masao Kano
Shigeru Myodo
Sumie Murota
Mari Yamanoshita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP17000787A priority Critical patent/JPS6415078A/en
Publication of JPS6415078A publication Critical patent/JPS6415078A/en
Pending legal-status Critical Current

Links

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PURPOSE: To ensure a satisfactory ball visible manner by setting the upper limit of reflectance of a wall in rear of a base line in an indoor tennis court, to a predetermined value. CONSTITUTION: A maximum value of the light intensity Lw on the wall surface of a wall 2 in rear of a base line is obtained at a point corresponding to an oblique light angle of 45deg. of a light fitting 4, that is, at a height of about 4.3m from the court 1, and the value is 142cd/cm<2> when the reflectance of the wall 2 is 60%. Meanwhile, the light intensity Lw of the wall 2 is proportional to a reflectance ρw of the rear wall 2, and a maximum light intensity Lw of the wall surface is Lw =142ρw/0.6. Substituting a term of a light intensity of a ball 6, LB=100cd/m<2> >Lw, into the above formula, ρw<0.42 is obtained. That is, the reflectance 7()w of the wall 2 always has 42% at its upper limit so that the relationship LB>Lw can be maintained, and as a result, it is possible to prevent both light intensity contrasts from reversing or becoming zero, thereby it is possible to obtain a satisfactory ball visible manner.
JP17000787A 1987-07-08 1987-07-08 Indoor tennis court Pending JPS6415078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17000787A JPS6415078A (en) 1987-07-08 1987-07-08 Indoor tennis court

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17000787A JPS6415078A (en) 1987-07-08 1987-07-08 Indoor tennis court

Publications (1)

Publication Number Publication Date
JPS6415078A true JPS6415078A (en) 1989-01-19

Family

ID=15896860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17000787A Pending JPS6415078A (en) 1987-07-08 1987-07-08 Indoor tennis court

Country Status (1)

Country Link
JP (1) JPS6415078A (en)

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