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Technical Report on Optical Measurement and Light Measurement Vol. 14-2

Technical Report on Optical Measurement and Light Measurement Vol. 14-2

Technical data presentation: Information on program constants CLK and BEAT values is now available!

This document is a technical report on the program constants CLK and BEAT values. It seeks to determine two important constant factors (CLK constant and BEAT constant) in signal processing circuits. The experimental results for measuring the CLK constant and the BEAT constant are explained in detail using graphs. [Contents] ■ About CLK and BEAT values ■ Measurement results ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
  • Other measurement, recording and measuring instruments

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Technical Report on Optical Measurement and Light Measurement Vol. 14-4

Technical Report on Optical Measurement and Light Measurement Vol. 14-4

[Technical Data Presentation] Publication on real-mode measurement targeting long-duration measurements.

This document is a technical report explaining real-mode measurement targeted at long-duration measurements. In the heterodyne processing system, we constructed measurement technology in real mode. The main focus of the construction was the signal processing device. We confirmed the operation according to theory using a synthesizer and verified a resolution of less than 1 nm. Additionally, we obtained the operational range of various parameters. Using this device, we conducted measurements in air and inside a vacuum chamber with a standard optical system. [Contents] ■ Real-mode settings for long-duration measurements ■ Data measurement and analysis using a synthesizer ■ Data measurement and analysis with a standard optical system ■ Data measurement and analysis with a standard optical system in a vacuum chamber ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol. 14-7

Technical Report on Optical Measurement and Light Measurement Vol. 14-7

Presentation of technical data: Publication on measurements in the atmosphere for a multi-type optical system with a path length difference of 40mm.

This document is a technical report explaining measurements taken in the atmosphere with a path length difference of 40mm in a multi-type optical system. In a high-precision measurement multi-type optical system, the path length difference was set to 40mm, and the displacement changes were evaluated in the atmosphere with significant temperature fluctuations. The report explains long-duration displacement measurements and temperature fluctuation measurements using graphs. [Contents] - Long-duration displacement measurement results and temperature fluctuations - Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
  • Other measurement, recording and measuring instruments

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Technical Report on Optical Measurement and Light Measurement Vol. 14-8

Technical Report on Optical Measurement and Light Measurement Vol. 14-8

Publication on the verification of reproducibility in atmospheric measurements for a multi-type optical system with a path length difference of 40mm.

This document is a technical report discussing the measurement of a multi-type optical system with a path length difference of 40mm in the atmosphere and the confirmation of reproducibility. In "Technical Report Vol. 14-7," results from the multi-type optical system (path length difference = 40mm) were presented, demonstrating that the measurement results can be explained by optical-based linear expansion. The reproducibility has now been confirmed. The long-term displacement measurements and temperature fluctuation measurements are explained using graphs. [Contents] ■ Long-term displacement measurement results and temperature fluctuations ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
  • Other measurement, recording and measuring instruments

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Technical Report on Optical Measurement and Light Measurement Vol. 14-9

Technical Report on Optical Measurement and Light Measurement Vol. 14-9

[Technical Data Presentation] Publication on Real Mode Long-Term Measurement Results (Reconfirmation of Reproducibility)

This document is a technical report explaining the long-duration measurement results in real mode (reconfirming reproducibility). Re-measurements were conducted under the same conditions as "Technical Report Vol.14-8." (In the case of a multi-type optical system with a path length difference of 40mm; R7) The long-duration displacement measurements and temperature variation measurements are explained using graphs. [Contents] ■ Real mode settings ■ Long-duration displacement measurement results and temperature variations ■ Discussion *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
  • Other measurement, recording and measuring instruments

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Technical Report on Optical Measurement and Light Measurement Vol. 15-1

Technical Report on Optical Measurement and Light Measurement Vol. 15-1

[Technical Data Presentation] Measurement results in the atmosphere at zero optical path length difference for multi-type optical systems.

This document is a technical report explaining the measurement results in the atmosphere at zero optical path length difference for a multi-type optical system. The optical system is set to essentially zero the difference in the REF side optical path length, and long-duration measurements in real mode were conducted. Compared to settings with a 40mm optical path length difference, the displacement variation was significantly smaller, with fluctuations of ±1nm observed over a period of 4000 seconds. [Contents] ■ Theory and practice of zero optical path length ■ Examples of displacement variation ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol. 15-2

Technical Report on Optical Measurement and Light Measurement Vol. 15-2

Technical data presentation: Measurement results in a vacuum with zero optical path length difference for heavy optical systems.

This document is a technical report explaining the measurement results in a vacuum under the condition of zero optical path length difference for a multi-type optical system. It reports the measurement results in a vacuum under the setting condition of zero optical path length difference for a multi-type optical system. In the optical system with zero optical path length in a vacuum, it has been experimentally demonstrated that temperature fluctuations of the air and the presence of air do not need to be considered. 【Contents】 ■ Issues regarding measurements in a vacuum under zero optical path length conditions ■ Examples of displacement fluctuations ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol. 15-3

Technical Report on Optical Measurement and Light Measurement Vol. 15-3

Explanation of the results in the atmosphere and vacuum under the condition of a path length difference of 0mm in a multi-type optical system.

This document is a technical report that explains the results in air and vacuum under the condition of zero optical path length in a multi-type optical system. It discusses the "impact of air refractive index under zero optical path length conditions" and analyzes "examples of displacement variation (reposting of previous report data)" using graphs and other illustrations. [Contents] ■ Impact of air refractive index under zero optical path length conditions ■ Analysis of examples of displacement variation (reposting of previous report data) ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol. 14-3

Technical Report on Optical Measurement and Light Measurement Vol. 14-3

Presentation of technical data: Publication on the vertical resolution of signal processing devices.

This document is a technical report explaining the vertical resolution of signal processing devices. In a heterodyne processing system, the presence or absence of vertical resolution in the signal processing device was verified in real mode using a synthesizer. When the frequency difference between the two signals was more than 1 mHz, the resolution obtained was as theoretical. Particularly, during a 5-minute measurement in real mode, the resolution was below 1 nm, and this resolution was maintained even in repeated measurements. Similar results were obtained using three types of synthesizers, confirming the characteristics of the signal processing device. [Contents] ■ About the signal processing device ■ About the signal processing software ■ Theory regarding frequency differences ■ Experiments regarding frequency differences ■ Reflection and discussion *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol. 14-5

Technical Report on Optical Measurement and Light Measurement Vol. 14-5

Presentation of technical data: Publication of long-duration measurement results in standard optical systems.

This document is a technical report on long-duration measurement results in real mode (using a standard optical system). After resolving several issues in the heterodyne processing system, real mode measurements were conducted. The real mode measurements allow for the selection of various conditions. In the standard optical system, long-duration measurements were performed, and the fluctuations were recorded. Displacement amounts and temperature variations were measured simultaneously. [Contents] ■ Real mode settings ■ Long-duration displacement measurement results and temperature variations ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol.14-6

Technical Report on Optical Measurement and Light Measurement Vol.14-6

[Technical Data Presentation] Regarding the long-duration measurement results in real mode (operation in the vacuum of the optical system).

This document is a technical report on the long-term measurement results in real mode (regarding the operation of the standard optical system in a vacuum). Two points that are likely to be problematic in a vacuum, "variations in the refractive index of air" and "distortion of the optical system due to atmospheric pressure," have been examined. It has been considered that these will not cause significant issues. Variations in displacement can be explained by temperature fluctuations, and an expansion value of approximately 40% of free expansion can be inferred. The vertical resolution has also been confirmed to be below 1 nm. [Contents] ■ Expansion and the presence of air ■ Displacement measurement results and temperature fluctuations ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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Technical Report on Optical Measurement and Light Measurement Vol. 15-4

Technical Report on Optical Measurement and Light Measurement Vol. 15-4

Presentation of Technical Data: Explanation of Variations Measurement on Glass Surfaces Using a 1 Beam Emission Probe

This document is a technical report explaining the measurement of fluctuations on glass surfaces using a single beam emission probe. A probe with a standard emission method (based on the same concept as the standard optical system) was created, and the photoelectric conversion device was constructed based on an APD. Using this probe and others, the characteristics of raw glass surfaces were evaluated in real mode. 【Contents】 ■ Configuration of the beam emission probe, etc. ■ About the samples ■ Examples of displacement fluctuations ■ Impact on measurements from the backside ■ Discussion and reflections *For more details, please refer to the PDF document or feel free to contact us.

  • Optical Measuring Instruments
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