Category Archives: 光学工程 Optical Engineering

Elsevier is ROCK!

I am always want to bring the paper in to my kindle for detail reading and note, which is really convenient in kindle rather than by pan and paper, or cellphone, or laptop.


But the thing i can’t solve is, there is no a great tool for pdf to epub/mobi book. If you read pdf paper directly, your eyes will be hurt. The size is painfully small, not to mention the figures, that ruined.


So how the problem solved? Well, i really don’t expect this: You can download a paper from Elsevier/ScienceDirect into Epub/Mobi format!!!!! Now this is ROCK!!!!! I love this.



I think the new paper, i will download both PDF and Epub/Mobi version for reading. And we can note the great expression in other paper to improve my English.


Thank you Elsevier, you’ve done a great job.

Google Glass 3D optical layout reconstruction, based on teardown information

中文读者请看  Google Glass 使用了哪种显示技术?具体是怎么实现的?

Chinese reader please hit this:


Since my major is Optical Engineering, I am very exciting about Google Glass, and also keep eyes on it from the beginning. Several months after introduced glass, the explore edition hit the developer. Some of them make a teardown test, even it was not a completely teardown, we can get lots of information from it.

This post is an original “research” article, based on teardown information that I can find in the Internet. Shows how we can get an almost complete optical layout from the information.


First, according to several hackers and developers[1][2][3][4][5], the hardware configuration is:


RAM: 682 MB

Display resolution: 640 x 360 pixel (very important information)

Internal storage: 16 GByte


Invensense MPU9150=Invensense MPU6050 (3 axis gyroscope + 3 axis accelerometer)+Asahi Kasei AKM8975 (3 axis geomagnetic sensor(compass))

LiteON LTR-506ALS rear-facing sensor(RFS) or “proximity” sensor

One more thing, glass support “wink” command, up to 20 winks!

So here is main information source from teardown test from Bill Detwiler [1] [5] <- hit it, very good articles. He opened the front shell ……

Click here to view original post from Bill Detwiler

Figure 1 cracking open Glass from Bill Detwiler and TechRepublic. I think (a) the flexible PCB with white characters is the interconnection between these module; (b) the small connector near the prism is connected to RGB LED light source.

Read more »