跳到主要內容

Who invented the telescope?




 

Romans made vessels by glass blowing starting 1st century AD

1185 first spectacles appeared

Two Italians are usually quoted as first one to make spectacles -Alexandro della Spina, a Dominican monk of Pisa, and his friend Salvino d'Armati of Florence. Spina died in 1313 and that Armati's tombstone bears the frequently quoted inscription:

Here lies Salvino degli Armato of the Armati of Florence. Inventor of Spectacles. God pardon his sins. A.D.1317.

The Venetian industry exported its mirrors to royalty and private bourgeois clients across Europe in the late 1500's and 1600's

galerie de glaces. Hall of mirrors in Palace of Versailles were constructed under the order of Louis XIV 1678-1684

a brass-decorated telescope ( magnifying glass?) was among objects bequeathed by a Spaniard, Don Pedro de Carolona, to his widow in Barcelona in 1593. Nick Pelling(controversial)

1608 Dutch optician Hans Lippershey attempted to patent the first telescope 

Ippolito Francini, Galileo lens maker, make the first  lens grinding and polishing machines

1612 Johannes Kepler designed the Keplerian telescope, convex objective and concave eyepiece, inverted image

1630 Jesuit Christoph Scheiner also made telescope according to Keplerian , and observed sunspots

1655 Dutch Christiaan Huygens built according to design of Kepler, discovered Titan, satellite of Saturn

Torricelli, Divini and Campani

1660 telescope competition in Rome , Divini vs Campani

1663 James Gregory designed the first gregorian reflector telescope

Zucchi and his works

1668 Isaac Newton made first Newtonian telescope 

telescopic discoveries of Galileo Galilei (1564–1642), 1609, observed moon craters

circa 1665 Giuseppe Campini made 113 cm objective for Paris Observatory

and objective lens making video

1720 John Hadley made a reflector with parabolic mirror 

Achromatic telescope

John Dollond 1750

Chester Moor Hall 1729

Albert Van Helden, in 1977 said: The telescope was not invented ex-nihilo

full of national and regional pride in behind of "who..."


 

the path of telescope  making:

discovery, design, theory,publish and patent, making and improving, observing, scaling up, mass production

list of astronomical instrument makers 

Rolf Willach long route 

Astrosurf

historyoftelescope 

sutori

scifacts 

History of telescope Henry King

江苏邗江甘泉二号汉墓广陵王刘荆墓金圈嵌水晶石放大镜(東漢), 但應用呢?

留言

這個網誌中的熱門文章

Scythians 斯泰基 塞種 西古提人

900 BC - 200 AD British museum   Tomb of scythe prince, Buktarma valley, 1200 masl, Google map Herodotus   絲路上的帝國 Biblegeography   哥羅西書 3:11  在此並不分希利尼人、猶太人、受割禮的、未受割禮的、化外人、 西古提人 、為奴的、自主的.惟有基督是包括一切、又住在各人之內。 塞種 塞迦  saka 史記漢書 西域傳: 塞種  ctext 昔匈奴破大月氏,大月氏西君大夏,而塞王南君罽賓。塞種分散,往往為數國。自疏勒以西北,休循、捐毒之屬,皆故 塞種 也。 匈奴列傳 Ctext :塞王 《史記》在《大宛列傳》與《匈奴列傳》中, 詳細 記錄了中亞至天山一帶的塞種(塞王、塞地)狀況。例如,文中記載了月氏西破走塞王,導致塞人南遷越過懸度(今帕米爾高原及克什米爾一帶) Baike Genetic history   Genetics  Nih griffin  ? Scytho-Siberian  world 塞迦 saka  wiki Disappeared? Sarmatians ( 薩爾馬泰 , 奄蔡 史記 ,  Aorsi )and goths YouTube  

calculate pH of phosphoric acid

Question: adding 1/4 teaspoon of 10% phosphoric acid  to 19 litres of water, what will be the pH? Let's go through the calculations step by step. Step 1. Convert mass ( or volume) of 10% phosphoric acid to mole per litre ( mol/L) The above calculation shows that 1/4 tsp of H3PO4 acid is 6.97e-5 mol/L Step 2. Input this value to BATE (or other app) to calculate pH The answer: pH = 4.16, ie too acidic !? If you use pipette instead of teaspoon,  1 drop = 0.05ml. So 1/4 TSP means roughly 25 drops If you actually aim for pH 5.6 (which is optimum pH for mashing), conc will be 2.51 e-6, or 1/100 tsp , 0.044 ml, roughly 1 drop Let's roll back a bit. From  recipes of   BarleyWine , summer rye , hefe Gordon Strong suggested to use 1/4 teaspoon of 10% phosphoric acid, which is targeting pH of 5.5..... Discussion on  homebrewtalk  forum. However using online BF water calc , Sparge pH would be 4.6. but he also added 1 tsp of CaCl2. 2H20. Mash pH change from 5.7 t...

ES8311 and ES8388 codec IC

ES8388 audio codec module is one of the audio codec modules available that is supported by ESP32 and official ESP-ADF releases. The ES8388 module lets you have: Stereo microphone and line input Stereo headphone and line out Up to 96 kHz 24 bpp high quality audio This module is compatible with all MCUs that have I2C and I2S ports (like ESP32, ESP8266, STM32, i.MX6, Raspberry Pi, etc) ES8311 Maxgerhardt github PCBartist twblogs ESP32-A1S  (limited stock)Audio codec AC101 or ES8388 built-in. NB the pinouts and firmware are different! Arduino - ESP31-A1S instructable Phil Schatzmann and his github   Simple A2DP thaaraak github on ESP32-A1S github of Yveaux and  Marcel-licence ESP ADF   example:  Logitech PiCorePlayer squeeze lite squeezebox forum   ESP32-Audio-kit  (from AI thinker) based on ESP32-A1S, is simple and small. But upgrade-ability seems limited  Alex John Talbert mixer equalizer: can this be used as simple equalizer? how about proces...