www.fransvanschooten.nl

Drawing instrument

According to the catalog of the Istanbul Museum of History of Science and Technology in Islam, the instrument was invented by Leonardo da Vinci and elaborated by the Italian professor Roberto Marcolongo.

Wikipedia: Leonardo da Vinci

Wikipedia: Roberto Marcolongo

 

Istanbul Museum of the History of Science and Technology in Islam

The museum (Islam Bilim ve Teknoloji Tarihi Müzesi, IBTTM) is situated in Gulhane Park and opened its doors in 2008.

History of the museum

Virtual Tour

 

Ibn al-Haytham

Ibn al-Haytham (965-1041), born in Basra (Iraq) made great progress in understanding the phenomenon of light. With experimental setups he examined the reflection of light in mirrors, not only flat, but also in curved or cone-shaped mirrors.

YouTube: Apparatus for the Observation of the Reflection of Light

 

 

 

 

 

 

Lecture on an instrument for finding reflection points in all kinds of mirrors

Monday 17 May 2021, a lecture will be held for students of Asst. Prof. Dr. Aslan Seyhan from Bartin University. Students can prepare themselves in advance by creating a paper version of the instrument, using the cut-out sheet. Three introductory assignments are in the handout.

  • Cut-out Sheet

    Print the cut-out sheet, preferably on 250 grams paper.

  • Handout

    Print the handout with the exercises, preferably on A3 format.

  • Presentation

    The presentation is available here.

Cut-out Sheet

Print the cut-out sheet, preferably on 250 grams paper. Otherwise glue three ordinary paper sheets. Link the components with brass fasteners.

  • Cut-out Sheet

    Print the cut-out sheet, preferably on 250 grams paper.

Introductory assignments

Make the three introductory assignments in the handout in a drawing programme such as Paint and send the answers to h.hietbrinkplanet.nl.

  • Handout

    Print the handout with the three exercises, preferably on A3 format.

5

5

5

5

top
 


Conference Proceedings

This lecture has been presented at the The First International Prof. Dr. Fuat Sezgin History of Science in Islam Symposium in Istanbul in 2019. My contribution to the conference proceedings are available. A translation into Turkish was sponsored by Bursa Science Center.

  •   Reflection Points

    In The 1st International Prof. Dr. Fuat Sezgin Symposium on History of Science in Islam Proceedings Book my contribution The Istanbul Museum of the History of Science and Technology in Islam as a Source of Inspiration for Modern High School Education: An Instrument for Finding Reflection Points is included. It shows how old instruments from a museum collection can be used for inspiring education.

  • ... yansima noktalarini bulmak için bir araç.

    Bursa Science Center sponsored my Turkish translation.

55

top
 


Ibn al-Haytham

Although the instrument is attributed to Leonardo da Vinci, the main actor is Ibn al-Haytham. Ibn al-Haytham (965-1041), born in Basra (Iraq) made great progress in understanding the phenomenon of light. With experimental setups he examined the reflection of light in mirrors, not only flat, but also in curved or cone-shaped mirrors. The Dictionary of Scientific Biography is a reliable source of information on the life and works of Ibn al-Haytham. A long list of sources is available on my web page.

top
 


On the Shape of the Eclipse

Did you ever wonder how the shape of the eclipse would look like in a camera obscura? Did you ever asked yourself why the shape of a crescent moon becomes a circle in a camera obscura? Ibn al-Haytham was the first scientist who gave a correct mathematical explanation in his treatise On the Shape of the Eclipse.
On the left, you see the eclipse, on the right, you see the shape of the eclipse on the wall of the camera obscura.

4
 

4
 

top
 


Animation

Use the slider to examine the different mirrors: flat, convex circle, concave circle, convex ellipse or concave ellipse. You can choose where the eye and the light source are situated with respect to the mirror. You can set the viewing direction with the movable point on the circle around the eye. With the buttons you can choose to make the drawing instrument visible or show the geometric location of the reflection points.

1
Start animation

top
 


The Second International Prof. Dr. Fuat Sezgin History of Science in Islam Symposium

According to the catalog of the Istanbul Museum of History of Science and Technology in Islam, Ibn al-Haytham invented an instrument for the observation of the reflection of light. My aim is to develop a hands-on classroom lesson series using a low-cost 3D-printed apparatus to bring the optics of Ibn al-Haytham alive.

Apparatus