Performance evaluation of Littrow lens assembly for Visible Emission Line Corongraph (VELC) on board Aditya-L1 mission von Narra, Venkata Suresh, Budhiraju, Vishweshwar Rao, Venkatasubramanian, Natarajan, Raha, Bijoy, Hegde, Bhavana, Uppuluri, Rama Subrahmanyam, Dasamantarao, Utkarsha, Somasundaram, Pawan Kumar, Ramaswamy, Venkateswaran, Padhavu, Umesh Kamath, Venkatesan, Sriram Kuppuswamy, Budihal, Raghavendra Prasad

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Direct determination of focal length by using Talbot interferometry von Sriram, K V, Kothiyal, M P, Sirohi, R S

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Talbot interferometry in noncollimated illumination for curvature and focal length measurements von Sriram, K V, Kothiyal, M P, Sirohi, R S

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Double-wedge-plate interferometer for collimation testing: new configurations von Sriram, K V, Senthilkumaran, P, Kothiyal, M P, Sirohi, R S

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Collimation testing with linear dual-field, spiral, and evolute gratings: a comparative study von Sriram, K V, Kothiyal, M P, Sirohi, R S

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