div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: INJNTU · interferometer mercury vapour lamp is used as light source--NPL flatness Q In NPL flatness interferometer vapour lamp is used as light —beam splitter Q The light src=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divpINJNTUCOMp pINJNTUCOM INJNTUCOMINJNTUCOMp div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadivdivdiv class=ts-pagebuttonPage 2button div class=ts-image a href=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5page2jpg target=_blank amp-img class=ts-thumb alt=Page 2: INJNTU · interferometer mercury vapour lamp is used as light source--NPL flatness Q In NPL flatness interferometer vapour lamp is used as light —beam splitter Q The light src=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divpINJNTUCOMp pINJNTUCOM INJNTUCOMINJNTUCOMp div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadivdivdiv class=ts-pagebuttonPage 3button div class=ts-image a href=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5page3jpg target=_blank amp-img class=ts-thumb alt=Page 3: INJNTU · interferometer mercury vapour lamp is used as light source--NPL flatness Q In NPL flatness interferometer vapour lamp is used as light —beam splitter Q The light src=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5thumbnails3jpg width=142 height=106 layout=responsive amp-imga divpINJNTUCOMp pINJNTUCOM INJNTUCOMINJNTUCOMp div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadivdivdiv class=ts-pagebuttonPage 4button div class=ts-image a href=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5page4jpg target=_blank amp-img class=ts-thumb alt=Page 4: INJNTU · interferometer mercury vapour lamp is used as light source--NPL flatness Q In NPL flatness interferometer vapour lamp is used as light —beam splitter Q The light src=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5thumbnails4jpg width=142 height=106 layout=responsive amp-imga divpINJNTUCOMp pINJNTUCOM INJNTUCOMINJNTUCOMp div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadivdivdiv class=ts-pagebuttonPage 5button div class=ts-image a href=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5page5jpg target=_blank amp-img class=ts-thumb alt=Page 5: INJNTU · interferometer mercury vapour lamp is used as light source--NPL flatness Q In NPL flatness interferometer vapour lamp is used as light —beam splitter Q The light src=https:reader043vdocumentssitereader043viewer20220219165e24e9f856897f2f864d2498html5thumbnails5jpg width=142 height=106 layout=responsive amp-imga divpINJNTUCOMp pINJNTUCOM INJNTUCOMINJNTUCOMp div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadiv div class=annotationa href=INJNTUCOM rel=ugc nofollow target=_blankINJNTUCOMadivdiv