Daido Steel

Daido Steel logo

Daido Steel has set itself as a pioneer in LEDs manufacturing by developing LEDs using the MOCVD method since 1985, long before MOCVD method became the major LEDs manufacturing method.

Daido Steel, also, has over 20 years of LED sales experience in the industrial machinery market, making it the perfect ally for your project.

 

Point Source LED (PSL)

Point source LED

High-performance point source LEDs, suitable for high accuracy sensors

 

Star LED (Daido's LED brand name) is a point source LED, used for high resolution optical encorders and photoelectrical sensors.

Comparison between Point Source LED and Surface Emitting LED

Point Source LED

Surface Emitting LED


Application

  • Optical encoders
  • Photoelectric sensors
  • Semiconductor manufacturing equipment
  • Medical testing equipment
  • LED lighting
  • Automative Headlights
  • Backlights

Beam size

point source LED beam size
surface emitting LED beam size
  • Smaller beam size
  • Higher light intensity per unit area
  • Larger beam size
  • Lower light intensity per unit area

Shadow of object

point source LED shadow of object
surface emitting LED shadow of object
  • Clear shadow
  • No clear shadow

Technical advantages

High resolution and accuracy

Star LED (Point source)

General LED (Surface emission)


For optical encoder

point source emission for star LED
general LED for optical encoder
  • Shaper images
  • Higher resolution
  • Loose images
  • Lower resolution

For photoelectric sensor

star led for photoelectric sensor
general LED for photoelectric sensor
  • Smaller beam size
  • Higher precision
  • Larger beam size
  • Lower precision

High-temperature operation

  • Flexibility in encoder thermal design with high temperature operation (105 degree).
  • High reliability at high temperature and high current operation.
high temperature operation 60µm
high temperature operation 160µm

Applications

target application: encoder
target application: photoelectric sensors

Infrared Point source LEDs

Wave length (nm)

Part number

Dimension (µm)

Light output (mW)

Cutoff frequency (MHz)Features
Light emitting window

Die size

L x W x T

@50mA

@50mA

±20mA

855MED8P51170 x 50590 x 370 x 2502.0-

Oval shape window

MED8P53φ60370×270×2502.045Small window
MED8P54φ160490×310×2502.425High reliability
MED8P56Aφ160510×350×2502.425Low stray light
MED8P62φ60590×370×2502.045Ball lens mountable
MED8P67Aφ60400×300×2502.045Small window Low stray light
MED8P73φ60370×270×2502.045105℃ operation

MED8P74φ160490×310×2502.425105℃ operation

Red Point source LEDs

Wave length (nm)

Part number

Dimension (µm)

Light output (mW)

Cutoff frequency (MHz)Features
Light emitting window

Die size

L x W x T

@20mA

@20mA

±10mA

650MED7P2φ160490×310×2501.0-High reliability
MED7P3φ160490×310×2500.830High Speed
MED7P4150x40490×310×2500.9-Oval shape window
MED7P5φ150370×220×1800.9-High reliability
MED7P7φ80320×220×2000.9-Small window
MED7P14φ160520×340×1502.0-High output

LED package

Type

Part number

Wave length (nmBeam angleOutput power (mW)

 

Remarks
FWHM(°)@20mA@50mA
Surface mountMED7P14-SMF-16501305.7-Thin
CanMED8P53-M18F-2855120-2.0TO-18 flat lens

MED8P54-M46F-5855100-2.8TO-46 flat lens
MED8P54-M46L-28554-4.0TO-46 dome lens