JPS5750621A - Method for determining cavity index - Google Patents

Method for determining cavity index

Info

Publication number
JPS5750621A
JPS5750621A JP12699780A JP12699780A JPS5750621A JP S5750621 A JPS5750621 A JP S5750621A JP 12699780 A JP12699780 A JP 12699780A JP 12699780 A JP12699780 A JP 12699780A JP S5750621 A JPS5750621 A JP S5750621A
Authority
JP
Japan
Prior art keywords
scale
graduations
calculation
point
values
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
JP12699780A
Other languages
Japanese (ja)
Inventor
Takeshi Goda
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.)
YAMADA DAYBRIGHT KK
YAMADA DEEBURAITO KK
Original Assignee
YAMADA DAYBRIGHT KK
YAMADA DEEBURAITO KK
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 YAMADA DAYBRIGHT KK, YAMADA DEEBURAITO KK filed Critical YAMADA DAYBRIGHT KK
Priority to JP12699780A priority Critical patent/JPS5750621A/en
Publication of JPS5750621A publication Critical patent/JPS5750621A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PURPOSE:To eliminate the need for making calculation, and to facilitate the calculation of room interior lighting, the designing of a model room, etc. by determining a cacity index by using a specially constructed alignment chart. CONSTITUTION:One side of a regular triangle is used as a scale (t) having no graduations and a scale W provided with graduations for setting frontage sizes with the scale (t) as origin and a scale CR provided with graduations for the purpose of reading cavity indices are provided to the other two sides. Graduations for setting cavity depth (h) with the vertex as origin are provided to a scale (h) erected in parallel with the scale CR at the point of intersection of the scale (t) and the scale W. The 0-10 values of N of 10Nmm. length are graduated on the scale CR, the 0-5 values of N of 20Nm length on the scale (h) and the values of 200/(50+N)m on the scales W, L. The sizes of the frontage and depth are set on the scales W and L and are connected by straight lines. The cavity index is determined from the point where the straight line connecting the point of intersections of said straight lines and the set point on the scale (h) intersects with the scale CR. Thereby, the need for calculation is eliminated, and the calculation of room interior lighting, the designing of a model room, etc. are facilitated.
JP12699780A 1980-09-12 1980-09-12 Method for determining cavity index Pending JPS5750621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12699780A JPS5750621A (en) 1980-09-12 1980-09-12 Method for determining cavity index

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12699780A JPS5750621A (en) 1980-09-12 1980-09-12 Method for determining cavity index

Publications (1)

Publication Number Publication Date
JPS5750621A true JPS5750621A (en) 1982-03-25

Family

ID=14949105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12699780A Pending JPS5750621A (en) 1980-09-12 1980-09-12 Method for determining cavity index

Country Status (1)

Country Link
JP (1) JPS5750621A (en)

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