VCM technology is highly cost effective compared to liquid lens autofocus. However, these advantages do come with cost implications. CostĪll the factors we discussed earlier indicate that liquid lens is much better than a VCM lens when it comes to features and functionalities. If you are trying to achieve autofocus with an M8 or M12 lens, then liquid lens is the way to go. Type of lens mountĪ VCM motor can power only tiny cameras such as the ones you see in cell phones. These make a VCM lens bulkier than a liquid lens.
Also, it needs to have the room within for the lens to move back and forth to adjust the focal length. Size and weightĪ VCM lens has a few mechanical parts. Hence, if you have restrictions in terms of the power your autofocus camera can draw, using a liquid lens is one of the ways to optimize power efficiency. Power consumptionĪ VCM powered autofocus lens is more power hungry than a liquid lens due to regular movement of the motor. In applications where the time delay between capturing two successive images of objects at varying distances, a liquid lens wins the race. However, a liquid lens can rapidly change its focus in as short a time as a few milliseconds. Time taken to focusĪ VCM autofocus lens requires the motor to move to change its focus. Many embedded vision use cases – especially those which require cameras to operate in industrial environments – demand a high temperature range, in which case a liquid lens is preferred. Operating temperature rangeĭue to the fact that liquid autofocus lenses dissipate less heat, they tend to operate reliably in wider temperature ranges as opposed to VCM lenses.
Hence in cases where a high life span and precision are required, an autofocus camera with liquid lens is recommended. Also, this wear and tear could over a time lead to lesser precision. This in turn results in shorter lifetime. Precision and lifetimeĬonstant movement in a VCM lens results in wear and tear of its mechanical parts. So, if your product or application demands controlled heat, liquid lens is a better choice to go with. Owing to this, there is much less heat dissipation in a liquid lens in comparison with a VCM lens. This would mean that the lens does not have to change its position or move mechanically to alter its focal length. Whereas in a liquid lens, autofocus is achieved by the movement of the liquid inside the lens in accordance with the electric field applied on it. This frequent movement of the lens causes friction, and hence results in more heat dissipation. A change in position of the lens with respect to the image sensor is required every time the camera needs to change its focal length. In a VCM autofocus lens, autofocus is achieved by means of the mechanical movement of the lens. Let us look at each of these in detail now. There are predominantly 9 criteria based on which you make a choice between a liquid lens and VCM lens. Factors to consider while choosing an autofocus lens Some of the applications that might require an autofocus camera include industrial handhelds, document scanners & cameras, dental cameras etc.ĭesigning an autofocus camera involves using an autofocus lens which comes in two variants – liquid lens autofocus, and Voice Coil Motor (VCM) autofocus.īut how do you pick the right lens out of the two? What are the factors you need to consider while choosing one for your application or product? Where is each of them used? In this article, we aim to answer these questions in detail. This requires the camera to quickly lock onto the target object to make sure that it is in focus. An autofocus camera module is typically used when the distance to the target object keeps varying during image capture.
#Vcm 2 selection not available registration#
Prerequisite: Course registration is restricted to MVS degree seeking students and requires approval from the instructor.Autofocus is one of the key features required for many embedded vision applications. The comprehensive capstone project will take a year to complete requiring students to register for this course the last two semesters of the degree program. Course registration is restricted to MVS degree seeking students and requires approval from the instructor. The capstone project must integrate theory and practical experience, draw upon students’ originality and creativity within appropriate scope, and stretch their research, analytical, writing, critical thinking, and other intellectual abilities.
#Vcm 2 selection not available professional#
Students will work on a comprehensive project simulating an experience in a professional setting. The Master of Veterinary Science (MVS) Integrative Learning Experience provides students with an opportunity to synthesize, integrate, and apply knowledge and skills acquired in MVS approved coursework. VCM 595 MVS Integrative Learning Experience credit: 1 to 8 Hours.