NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
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Results 1-5 of 13
Page 58
... mounted in a lens barrel or shut- A visual or a photographic method is used , depending upon the probable use of the lens . The back focal distance determines the lens position with respect to the focal plane for an ter . airplane ...
... mounted in a lens barrel or shut- A visual or a photographic method is used , depending upon the probable use of the lens . The back focal distance determines the lens position with respect to the focal plane for an ter . airplane ...
Page 59
... mounted in cameras . It gives the same information as test 202.202f except for back - focal distance . It is preferable that these lens characteristics be determined for the lens as mounted in a barrel shutter , but occasionally it is ...
... mounted in cameras . It gives the same information as test 202.202f except for back - focal distance . It is preferable that these lens characteristics be determined for the lens as mounted in a barrel shutter , but occasionally it is ...
Page 60
... mounted in preci- sion airplane cameras . 202.202g Determination of equivalent focal length and true geometric f- number for one marked stop - - ( * ) 202.202h Fee for each additional stop- ( * ) 202.202i Determination of focal length ...
... mounted in preci- sion airplane cameras . 202.202g Determination of equivalent focal length and true geometric f- number for one marked stop - - ( * ) 202.202h Fee for each additional stop- ( * ) 202.202i Determination of focal length ...
Page 61
... mounted in camera ( * ) 202.202z For special tests not covered by the above schedule , fees will be charged dependent upon the nature of the test . * For current fees , see Appendix C. 202.203 Optical components , spectacle lenses ...
... mounted in camera ( * ) 202.202z For special tests not covered by the above schedule , fees will be charged dependent upon the nature of the test . * For current fees , see Appendix C. 202.203 Optical components , spectacle lenses ...
Page 63
... mounting plate . inch thick , 5 % inches in diameter with four body drill holes , for no . 8 screws , spaced 90 ° apart on a center circle of 5 % inches in diameter . Item Description Fee 202.207a 202.207b 202.207z Determination of data ...
... mounting plate . inch thick , 5 % inches in diameter with four body drill holes , for no . 8 screws , spaced 90 ° apart on a center circle of 5 % inches in diameter . Item Description Fee 202.207a 202.207b 202.207z Determination of data ...
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Common terms and phrases
Ac-dc accepted for calibration accuracy additional American Standards Association API Standard apparatus Appendix attenuators bolometer bolometer units bulb and liquid Bureau of Standards calibration or test changes in emf charged dependent color temperature condenser microphones current fees decibels Determination diameter Electric electrode electromotive force end of table errors exceeding footnote at end frequency Gage blocks gages-determination glass Group of Standard higher or lower hygrometers ice-point reading indications inductors instruments Invar Item Description Fee laboratory length liquid column mass measurements meter National Reference Group ohms perature phase angle plug Precision pressure Radium ratio reference standards REPORT OF CALIBRATION resistance thermometer resistors ring gages sample saturated standard cells schedule special tests specifications spectrophotometer stability standard resistors submitted for calibration tabulated corrections apply temperature range test points test_ tests not covered thermal conductivity thermocouple thermometer was tested U.S. DEPARTMENT uncertainty voltage dividers waveguide weights
Popular passages
Page 11 - Standard Reference Materials issued by the National Bureau of Standards to calibrate a measurement system, or to produce scientific data that can be referred to a common base. A schedule of prices and amounts, as well as directions for ordering, is included.
Page 49 - ... index markers. Since it is necessary to determine the shift of the principal point resulting from prism effect in the lens, the equivalent focal length of the lens as mounted In the camera is incidentally determined...
Page 55 - ... wire loops, spring balances, tension handles, or other attachments liable to be detached or changed in shape. The error in the total length of the tape, when supported horizontally throughout its length at the standard temperature of 68° F. (20° C.) and at standard tension, shall not be more than 0.1 inch per 100 feet (2 mm per 25 m).