BENGALURU: The Indian Institute of Astrophysics (IIA), Bengaluru, an autonomous physique underneath the Division of Science and Expertise (DST), has performed an important function within the “Surya Tilak” mission at Ayodhya — the place daylight was directed onto the brow of Ram Lalla idol at 12pm on April 17, on the event of Ram Navami. This ritual will likely be repeated yearly.
Abhay Karandikar, secretary, DST, posted on X: “The group led by IIA carried out calculations of the Solar’s place, designed and optimised the optical system, and carried out the mixing and alignment on the web site.Because the temple is just not absolutely accomplished now, IIA consultants modified the design to swimsuit the prevailing construction and carried out picture optimisation. This design, with 4 mirrors and two lenses, was executed for the Surya Tilak.”
The ultimate design of the Surya Tilak, with 4 mirrors and 4 lenses, will likely be applied as soon as the complete temple is constructed by inserting the mirrors and lenses of their everlasting fixtures.
IIA director Annapurni Subramaniam advised TOI: We’ve employed a scientific design primarily based on the rules of periscope and the system had to enter the constructing in a selected place primarily based on the temple structure. The mission was commissioned round three years in the past. As soon as the idea was finalised, we needed to show after which we went into publication. As soon as this was finished, IIA gave technical session, primarily based on which Optica, Bengaluru, manufactured the gadget and Central Constructing Analysis Institute (CBRI) carried out the implementation of the opto-mechanical system on the web site.”
The English calendar date of Ram Navami competition modifications yearly because it follows the Lunar Calendar. Due to this fact, Karandikar stated, the place of the Solar within the sky modifications yearly on the day of Ram Navami.
“Detailed calculations present that the English calendar date of Ram Navami repeats each 19 years. Calculating the place of the Solar within the sky on lately requires experience in astronomy. The IIA group led the estimation of the dimensions, form and site of mirrors and lenses within the system for enough mild to fall on the idol for about 6 minutes,” Karandikar added.
Opto-mechanical design of the lens and mirror holder meeting, and guide mechanism had been carried out to shift the place of the primary mirror in response to the place of the Solar within the sky, Karandikar stated, including that this helped the complete system to work flawlessly for the Surya Tilak to be carried out efficiently.



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