Telescope Convex Mirror For Telescope Convex Sensor

Telescope mirrors come into two basic shapes: concave and convex. Concave mirrors are more common and are used as the primary collecting mirrors in most refracting telescopes. However, telescope convex mirror also has critical applications. While convex mirrors lack the light-gathering power of large concave mirrors in most telescopes, they play essential roles in magnifying, redirecting, and managing light in some reflecting telescope designs. Often used with or as an alternative to lenses, convex mirrors provide more options for achieving desired fields of view, image characteristics, and telescopes when needed. The main uses of the convex mirror in telescopes are secondary mirrors, telescope eyepieces, collimating optics, and auto-collimation.

 

At our company, we design and manufacture precision convex mirrors that expand the capabilities of telescopes and optical systems. Using state-of-the-art production and metrology techniques, we craft convex mirrors with figure accuracies measured in nanometers, smoothness down to single-digit angstroms, and coatings that minimize scatter and maximize reflectance across the visible and IR spectrum. Our convex mirrors open up new possibilities for controlling and manipulating light. Besides, no two telescope designs or experiments are alike, so we offer custom mirror engineering services. Our team of optical designers helps model unique mirror shapes, conic constants, and positions within your system for peak performance. Then our advanced production facilities craft these made-to-order convex mirrors to exacting specifications. Together, let us explore new frontiers of telescope and optics performance. We stand ready to help make your aspirations achievable. Contact us today to begin the discovery.

 

Features

- Precise figure

- Smooth surface

- Accurate conic constant

- High reflectance coating

- Low scatter

- Durability

 

Parameters

Product name	Telescope Convex Mirror
Surface figure error	<λ/20 RMS (λ/10 PV)
Surface roughness	≤5 nm RMS
Reflectance	95-99% over operating
Scatter	≤0.1% of incident light
Operating temp. range	-30℃ to 50℃
Size	30cm or custom
Substrates	Fused silica or custom
Mounting	Adjustable, thermally

 

Applications

The secondary mirror and the primary mirror determine a reflecting telescope's optical performance and imaging capabilities. Proper design, figured curvature and alignment of the convex secondary mirror are essential to a telescope's resolution, light grasp, and image quality. Some critical applications include:

- Light collection

- Imaging

- Light folding

- Increased focal length

- Spot diagrams

- Elimination of diffraction spikes

- Increasing eye point

 

Mirrors VS lenses

Mirrors and lenses are both commonly used optical elements but have some key differences:

 

Mirrors:

• Reflect light - Mirror-like telescope convex mirror redirects light by reflecting it off a polished surface. It changes the direction of light paths using the law of reflection.

 

• Limited wavelength range - A mirror's wavelength range depends on its reflective coating's properties. Most metallic coatings are suited for visible and infrared light. Ultraviolet or other wavelengths require special coatings.

 

• Flat or curved surfaces - Mirrors can have flat, convex (diverging), or concave (converging) surfaces. Curved mirrors are used to focus or spread light, while flat mirrors reflect at the same angle.

 

• 100% reflectance at one surface - An ideal mirror reflects all light at the mirror surface, with no transmission. This results in a sharp division between the reflected and unreflected light.

 

• Reversal of image - Mirrors produce a virtual image that is reversed left-to-right. This is due to a change in the orientation of the light path.

 

Lenses:

• Refract light - Lenses redirect light by refracting (bending) it as it passes through the lens material. They change the direction of light paths using refraction between two surfaces.

• Transparent to light - A lens's wavelength range depends on the lens material's transmission range. Many optical glasses transmit visible and infrared light, but lens materials for UV and IR are also available.

 

• Curved surfaces - Converging or positive lenses have two convex surfaces, and diverging or negative lenses have one convex and one concave surface. Lens curvature determines focusing power. Plano-convex or double concave lenses have one flat and one curved surface.

 

• Partial reflectance at each surface - Lenses reflect a portion of light at each character due to changes in the refractive index, allowing most light to transmit. This can result in ghost images and reduced intensity. Anti-reflection coatings minimize these effects.

 

• Preservation of image orientation - Lenses produce an actual image with the same left-to-right orientation as the object. The direction of the light path remains unchanged.

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