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Ccd Assembly
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Takahashi telescopes SKY90 model is designed

for portability. You'll have no problem carrying

this telescope anywhere, the optical tube assembly

is only 13.8" long, and weighs only 7 pounds.

The Takahashi SKY90 telescopeis equipped with

a fluorite doublet apochromatic optical system

for brilliant images. Takahashi is continually

upgrading its telescopic technology.

The TOA-130 is Takahashi Telescope's 21st

century innovation. It employs a newly designed

triplet using Takahashi special elements to

produce the highest order of color correction.

The TOA-130 is the perfect telescope for visual,

CCD and photo imaging. You'll be able to see

clear images of the moon and planets because

this telescope is equipped with the LE-ED 2.8mm

Takahashi ocular for high magnifications.

For astronomers who will do research and educational

projects, take a look at the Takahashi C400/EM3500

telescope. This Classical Cassegrain is part of Takahashi's

Observatory Series. This telescope will give you

extremely high resolution without sacrificing contrast

or a flat field because of its Classical Cassegrainian

configuration, with a parabolic primary mirror and

hyperbolic secondary.

The Takahashi FCT-200 Fluorite Apochromatic refractor

telescope is one of the largest manufactured by Takahashi.

It is designed for professional telescopic observatory use

at universities, planetariums, summer homes etc. Takahashi

has employed in this telescope the highest quality German

optical glass and Japanese Fluorite for the center element.

For maximum light transmissions all elements are multi-coated.

Takahashi continually strives to provide the most up to

date advanced telescope equipment.

Copyright © JJ PERSISTENT PUBLISHING, INC.

PERMISSIONS TO REPUBLISH: This article may be republished in its entirety free of charge, electronically or in print, provided it appears with the included copyright and authorÂ’s resource box with live website links.

Jeremy Hier is the Business Manager and Webmaster of Best Telescope Guides Jeremy Hier is a freelance writer and regular contributer He likes to offer his advice and tips to consumers looking to purchase meade telescopes and celestron telescopes

Slide Scanner - How Does It Work

The device that is used to create digital copies of slides and negatives, is called a Slide Scanner. Flatbed Scanners, Hand-held Scanners, Drum Scanners and Sheet-fed Scanners are the different types of scanner which cater different purposes.

To scan a slide, the slide is placed in the scanner. All scanners feature a holder that keeps the slide intact and few also have the capability to scan multiple slides. The carrier can be metal or plastic, which is where the slides are kept for scanning. LED lights or fluorescent bulbs are source of light for slide scanners. The lighting will be constant throughout the scanning process irrespective of which source is used. Sensors perform the function of converting analog light passing through the scan to digital format. The slide scanner sensors vary with type of scanner. CCD (Charged Coupled Device) array is the sensor that is used often. Sensors have a bunch of diodes, being light sensitive are also responsible for converting analog light to digital signal.

Slide scanners are classified into sequential array scanner and full frame sensor. Sequential scanner divides the slide into units for scanning and comes with three rows of sensors. Red, Blue or Green light is measured by each row. Full frame sensor and sequential array have separate sensors for colors yet vary in one aspect. The slide or the sensor is not moved when capturing the image. The carrier moves the slide across the light source and sensor assembly or moves the assemble over the slide. The moving rate of a carrier is determined by, electrical stepping motor which uses a drive belt or a rack and pinion system.

With a variation in sensor also comes a variation in scanning process. Light source is on the opposite side and passes through the slide when using a sequential sensor. First step is calibration where measurements of calibrate color balance, contrast and brightness are determined. The the carrier positions itself at the portion where scanning is to be done. The image is divided into portions or "slices" for scanning in sequence. The images are then arranged in order and made ready for transferring to a computer. On the other hand, scanners that come with full frame sensor generally take the slide carrier into the carriage. The image is moved to a predefined position after which the scanner scans the entire image as a whole. Using a USB or Fire Wire the images are then transferred to a system.

Scanning is done for two reasons: digitizing images and to get a clearer picture of them. The aspect that decides the clarity of the image is DPI or "dots per inch". 300 DPI is the ideal resolution or DPI. With the advent of a slide scanner, preserving the slides are no longer needed as they can be digitized.

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35mm slide scanners
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Please suggest a miniature pan tilt setup for ccd mount?

Our entire CCD assembly is about 10 x 10 mm. We need the smallest available pan tilt motor setup. Please suggest any

You will have to design it and build it yourself.. you DO have the ability and tools to do this, I assume.

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