公开(公告)号：US4989980A

公开(公告)日：1991-02-05

申请号：US318076

申请日：1989-03-02

Applicant: Ralph T. Berg

Inventor： Ralph T. Berg

IPC: G01B11/16

CPC classification number: G01B11/161

Abstract: A method and apparatus for optically measuring coefficient of thermal expansion includes an optical dilatometer system. The system provides a housing having a chamber defined therein and a transparent end adapted for receiving a focused laser beam into the chamber. The housing is adapted for maintaining a vacuum in the chamber. The optical dilatometer system further provides an interferometer comprising first and second interference surfaces, the interferometer being positioned within the chamber. The system further provides a test sample positioned between the first and second interference surfaces. The method includes the step of transmitting a focused laser beam through the transparent end and to the interferometer, thereby generating an interference pattern defined by Newton rings. The Newton ring interference pattern is utilized to determine the coefficient of thermal expansion of the test sample.

Abstract translation: 用于光学测量热膨胀系数的方法和装置包括光学膨胀计系统。 该系统提供具有限定在其中的腔室的壳体和适于将聚焦激光束接收到腔室中的透明端。 壳体适于在腔室中保持真空。 光学膨胀​​计系统还提供了包括第一和第二干涉表面的干涉仪，干涉仪位于腔室内。 该系统还提供了位于第一和第二干涉表面之间的测试样品。 该方法包括将聚焦激光束透过透明端和干涉仪的步骤，从而产生由牛顿环定义的干涉图案。 使用牛顿环干涉图来确定测试样品的热膨胀系数。

公开(公告)号：US5231285A

公开(公告)日：1993-07-27

申请号：US979364

申请日：1992-11-20

Applicant: Ralph T. Berg

Inventor： Ralph T. Berg

IPC: G01J9/02 ,  G01N21/45

CPC classification number: G01N21/45 ,  G01J2009/0292

Abstract: A method and apparatus for measuring the change in refractive index of a material with respect to temperature. The invention contemplates measuring the change in length of the material with respect to temperature over a predetermined temperature range with a Fizeau Interferometer by measuring the change in length through a vacuum at a point adjacent the length to produce a first set of data. Also measured is the change in the same length of the same material with respect to temperature over the same predetermined temperature range with the Interferometer by measuring the change in the length through the material to produce a second set of data. Determining the difference between the first and second sets of data produces resulting data which is the change in refractive index of the material with respect to temperature.

Abstract translation: 一种用于测量材料相对于温度的折射率变化的方法和装置。 本发明设想通过利用Fizeau干涉仪通过在与该长度相邻的点处的真空测量长度的变化来测量材料在相对于预定温度范围内的温度的变化，以产生第一组数据。 还通过测量通过材料的长度的变化产生第二组数据，通过干涉仪在相同的预定温度范围内相同温度下相同材料的相同长度的变化。 确定第一和第二组数据之间的差异产生作为材料相对于温度的折射率变化的结果数据。

公开(公告)号：US5121987A

公开(公告)日：1992-06-16

申请号：US600642

申请日：1990-10-19

Applicant: Ralph T. Berg

Inventor： Ralph T. Berg

IPC: G01B11/16

CPC classification number: G01B11/161

Abstract: A method and apparatus for optically measuring coefficient of thermal expansion includes an optical dilatometer system. The system provides a housing having a chamber defined therein and a transparent end adapted for receiving a focused laser beam into the chamber. The housing is adapted for maintaining a vacuum in the chamber. The optical dilatometer system further provides an interferometer comprising first and second interference surfaces, the interferometer being positioned within the chamber. The system further provides a test sample positioned between the first and second interference surfaces. The method includes the step of transmitting a focused laser beam through the transparent end and to the interferometer, thereby generating an interference pattern defined by Newton rings. The Newton ring interference pattern is utilized to determine the coefficient of thermal expansion of the test sample.

Abstract translation: 用于光学测量热膨胀系数的方法和装置包括光学膨胀计系统。 该系统提供具有限定在其中的腔室的壳体和适于将聚焦激光束接收到腔室中的透明端。 壳体适于在腔室中保持真空。 光学膨胀​​计系统还提供了包括第一和第二干涉表面的干涉仪，干涉仪位于腔室内。 该系统还提供了位于第一和第二干涉表面之间的测试样品。 该方法包括将聚焦激光束透过透明端和干涉仪的步骤，从而产生由牛顿环定义的干涉图案。 使用牛顿环干涉图来确定测试样品的热膨胀系数。

公开(公告)号：US4678335A

公开(公告)日：1987-07-07

申请号：US642616

申请日：1984-08-20

Applicant: Ralph T. Berg

Inventor： Ralph T. Berg

IPC: G01C19/64 ,  G01C19/66 ,  H01S3/083

CPC classification number: G01C19/661

Abstract: A laser block for a ring laser angular rate sensor is provided with an expandable ring inserted into a cavity through the block. The ring is rigidly expanded against the walls of the cavity with substantially zero axial deflection to increase the stiffness of the ring laser block with respect to forces perpendicular to its lasing plane.

Abstract translation: 用于环形激光角速度传感器的激光器块设置有通过该块插入腔的可扩张环。 环相对于腔的壁刚性地膨胀，具有基本上为零的轴向偏转，以增加环形激光块相对于垂直于其激光平面的力的刚度。