Hubble Primary mirror 305/1372 Pyrex Enhanced Coating

Hubble Optics introduces a groundbreaking lightweight sandwich mirror, offering a cost-effective and superior alternative to other lightweight and solid mirrors in the market. Inspired by the design of the Hubble Space Telescope, renowned for its advanced technology, these sandwich mirrors feature:

• Thermal and structural optimization with an open core for rapid thermal response, cooling down approximately 10 times faster than solid mirrors of equal thickness.
• Dynamically stable closed-back design.
• Simple flotation mounting.
• 20% lighter than solid mirrors of equivalent thickness.
• Competitive pricing with an unprecedented price/performance ratio, ensuring a Strehl Ratio of ≥ 0.975.

Why opt for a Sandwich Mirror?

Telescope mirrors undergo meticulous manufacturing in controlled temperature and humidity environments, ensuring precise measurement after equilibrium. However, during cooling, temperature gradients may cause surface deformation, leading to aberrations proportional to the coefficient of thermal expansion (CTE) of the substrate.

The primary concern is not deformation-induced aberrations but rather the layer of warm air in front of the mirror, causing image distortion known as "mirror seeing." This distortion stems from non-uniform diffraction index in the cooler air over the warm mirror surface. To mitigate this, mirrors must approach ambient air temperature, ideally within 0.2°C, to minimize distortion.

Hence, the objective is rapid temperature equilibration, reducing mirror seeing. Large professional mirrors utilize complex cooling systems for this purpose. However, thinner substrates significantly decrease thermal time lag, enhancing optical performance. Hubble Optics' lightweight sandwich mirrors excel in real-world scenarios, reaching equilibrium swiftly without active cooling systems, which may introduce vibration issues.

SPECIFICATIONS

Capacity

Aperture ratio (f/): 4.5

Surface reflection: 96%

Focal length (mm): 1372

Coating of optical system: Aluminium and silicon dioxide

General

Diameter (mm): 305

Diameter (″): 12

Height (mm): 49

Material: Pyrex glass

Series: Sandwich Mirror

Type: Parts & spares