Large polytetrafluoroethylene integrating sphere fabrication method

A method for fabricating an integrating sphere including twelve pentagonal spherical shells and twenty hexagonal spherical shells, wherein:

• each of the hexagonal spherical shells includes a first circular spherical shell having a first diameter and six first auxiliary spherical shells also having the first diameter, and
• each of the pentagonal spherical shells includes another first circular spherical shell having the first diameter and five second auxiliary spherical shells formed from a second circular spherical shell having a second diameter,
• the method comprising:
• preparing a first molding frame for forming the first circular spherical shell and a second molding frame for forming the second circular spherical shell;
• providing a PTFE powder to the first molding frame;
• compressively molding the first circular spherical shell with the PTFE powder on the first molding frame to form a compressively molded first circular spherical shell;
• providing a PTFE powder to the second molding frame;
• compressively molding the second circular spherical shell with the PTFE powder on the second molding frame to form a compressively molded second circular spherical shell;
• cutting the compressively molded first circular spherical shell to provide the first six auxiliary spherical shells;
• cutting the compressively molded second circular spherical shell to provide the second five auxiliary spherical shells;
• coating a bonding layer on a hemisphere for the integrating sphere and fitting together uncut compressively molded first circular spherical shells with a plurality of the first six auxiliary spherical shells and the second five auxiliary spherical shells to form a PTFE hemispherical shell;
• and
• recompressing the PFTE hemispherical shell by combining a recompression hemisphere with the hemisphere, where the PTFE hemispherical shell is interposed therebetween.