overhead projector
Classroom image enlarger
An overhead projector is a device that shines light through a transparent sheet placed on its horizontal surface, projecting an enlarged image onto a wall or screen.
A mainstay of classrooms and conference rooms through the late 20th century, it has been largely displaced by digital projectors and presentation software.
Light-focusing curved glass
- focalOf a central point
- screenDisplay or barrier
- mirrorReflective viewing surface
- focusConcentrated attention point
brightness · lamp · bulb · halogen · light · beam · image · enlargement
State of being see-through
- classroomEducational instruction space
- teacherOne who instructs others
- lectureEducational spoken presentation
- lessonUnit of teaching
instruction · blackboard · whiteboard · students · curriculum · academic · teaching · school
Smooth continuous movement
- transparencyState of being see-through
- acetateVinegar-derived compound
- speakerOne who talks
- audienceGathered viewers collectively
conference · business · meeting · corporate · keynote · diagram · chart · graph
Comparable equivalent
- vintageQuality from past eras
- retroEvoking recent past
- obsoleteNo longer in use
- AV equipmentSound and display hardware
audiovisual · document camera · LCD · replacement · upgrade · cart · trolley · portable
lens
Light-focusing curved glass
focus · brightness · lamp · bulb · halogen · light · beam · image · enlargement · sharpness
transparency
State of being see-through
- classroomEducational instruction space
- teacherOne who instructs others
- lectureEducational spoken presentation
lesson · instruction · blackboard · whiteboard · students · curriculum · academic · teaching · school · chalkboard
slide
Smooth continuous movement
- transparencyState of being see-through
- acetateVinegar-derived compound
- speakerOne who talks
audience · conference · business · meeting · corporate · keynote · diagram · chart · graph · handout
analog
Comparable equivalent
AV equipment · audiovisual · document camera · LCD · replacement · upgrade · cart · trolley · portable · electrical
- classroomdesk, desks, chair, chairs, teacher
- Analog Eratypewriter, rotary phone, record player, phonograph, turntable
- AV equipmentTV, streaming, audio player, cable box, DVD player
- classroom toolstablet, laptop, calculator, smartboard, microscope
- meeting roomsconference table, whiteboard, chairs, podium, lectern
- obsolete techfloppy disk, VHS, dial-up modem, cassette tape, floppy disks
overhead projectordigital projector
Device projecting images electronically
LCD projector · smart board · digital display · LED screen · video projector
overhead projectorOLED display
Self-emissive flat panel technology
digital projector · laser projector · LCD projector · LED wall · LED projector
overcome, overtake, overhead, projecting, projection, projected, overtime, projector, overheads