Jayanth S Narasimha - Academia.edu (original) (raw)

Articles by Jayanth S Narasimha

Research paper thumbnail of Gregorian Year To Vedic Samvatsara: An Algorithm that converts the Gregorian Calendar Year to its respective Samvatsara Name

Independent Research, 2024

Since it is easy for us to use the Gregorian Year, I have developed an algorithm that can estimat... more Since it is easy for us to use the Gregorian Year, I have developed an algorithm that can estimate the Samvatsara that falls in a particular Gregorian Year so that it facilitates the seamless use of our Samvat Method of ancient India.

Thesis Chapters by Jayanth S Narasimha

Research paper thumbnail of Development Of Customized Shack-Hartman Wavefront Sensor For Radius Of Curvature Measurement

Master's Thesis, 2019

Shack Hartmann Wavefront Sensor (SHWS) device is most commonly used in Adaptive Optics Systems. H... more Shack Hartmann Wavefront Sensor (SHWS) device is most commonly used in Adaptive Optics Systems. However, the same device can also be effectively used as an optical metrology instrument to characterize any optical system made of lenses or mirrors. To get acquainted with SMT, a prototype segment mirror telescope (PSMT) is being designed and developed at Indian Institute of Astrophysics (I.I.A) Bangalore. The proposed prototype telescope will use seven hexagonal mirrors, which will be supported by simple mirror support assembly and driven by developed voice coil based indigenous actuators. The PSMT mirror segments are planned to be manufactured in IIA optics fabrication facility. One of the stringent requirement associated with the PSMT mirror segments is that they should have almost matching ROC and any relative departure in the ROC by few hundred micron will results in substantial degradation in the telescope image quality. During the optics manufacturing process, the relative ROC of mirror segments need be measured precisely and then after any departure from required ROC has to be corrected at the manufacturing stage itself. After exploring various options to measure ROC, the PSMT engineering team has come up with an approach which uses SHWS. Since SHWS needed for the optics metrology has got specific requirements and therefore any commercially available SH may not serve the purpose. Therefore, we have been attempting to develop a customized SHWS which can be used to test PSMT mirror segments. As a first step we have designed the optics of the instrument using ZEMAX, then after mechanical structure and the control. We also developed necessary software to control the instrument as well as data analysis software. In this poster, we present the Opto-mechanical design and the Instrument control system of the instrument.

Research paper thumbnail of Gregorian Year To Vedic Samvatsara: An Algorithm that converts the Gregorian Calendar Year to its respective Samvatsara Name

Independent Research, 2024

Since it is easy for us to use the Gregorian Year, I have developed an algorithm that can estimat... more Since it is easy for us to use the Gregorian Year, I have developed an algorithm that can estimate the Samvatsara that falls in a particular Gregorian Year so that it facilitates the seamless use of our Samvat Method of ancient India.

Research paper thumbnail of Development Of Customized Shack-Hartman Wavefront Sensor For Radius Of Curvature Measurement

Master's Thesis, 2019

Shack Hartmann Wavefront Sensor (SHWS) device is most commonly used in Adaptive Optics Systems. H... more Shack Hartmann Wavefront Sensor (SHWS) device is most commonly used in Adaptive Optics Systems. However, the same device can also be effectively used as an optical metrology instrument to characterize any optical system made of lenses or mirrors. To get acquainted with SMT, a prototype segment mirror telescope (PSMT) is being designed and developed at Indian Institute of Astrophysics (I.I.A) Bangalore. The proposed prototype telescope will use seven hexagonal mirrors, which will be supported by simple mirror support assembly and driven by developed voice coil based indigenous actuators. The PSMT mirror segments are planned to be manufactured in IIA optics fabrication facility. One of the stringent requirement associated with the PSMT mirror segments is that they should have almost matching ROC and any relative departure in the ROC by few hundred micron will results in substantial degradation in the telescope image quality. During the optics manufacturing process, the relative ROC of mirror segments need be measured precisely and then after any departure from required ROC has to be corrected at the manufacturing stage itself. After exploring various options to measure ROC, the PSMT engineering team has come up with an approach which uses SHWS. Since SHWS needed for the optics metrology has got specific requirements and therefore any commercially available SH may not serve the purpose. Therefore, we have been attempting to develop a customized SHWS which can be used to test PSMT mirror segments. As a first step we have designed the optics of the instrument using ZEMAX, then after mechanical structure and the control. We also developed necessary software to control the instrument as well as data analysis software. In this poster, we present the Opto-mechanical design and the Instrument control system of the instrument.